diff --git a/.github/workflows/linting.yml b/.github/workflows/linting.yml
index 82f5abd23a1..b6d47fd2020 100644
--- a/.github/workflows/linting.yml
+++ b/.github/workflows/linting.yml
@@ -14,34 +14,93 @@ on:
 
 jobs:
   run-linters:
-    name: Run linters
+    name: Run all linters
     runs-on: ubuntu-latest
 
     steps:
       - name: Check out Git repository
         uses: actions/checkout@v4
         with:
-          submodules: 'recursive'
+          submodules: "recursive"
 
       - name: Install pnpm
         uses: pnpm/action-setup@v4
         with:
           version: 10
 
-      - name: Set up Node.js
+      - name: Set up Node
         uses: actions/setup-node@v4
         with:
-          node-version-file: '.nvmrc'
-          cache: 'pnpm'
+          node-version-file: ".nvmrc"
+          cache: "pnpm"
 
-      - name: Install Node.js dependencies
+      - name: Install Node modules
         run: pnpm i
 
-      - name: Lint with Biome
+      # Lint files with Biome-Lint - https://biomejs.dev/linter/
+      - name: Run Biome-Lint
         run: pnpm biome-ci
+        id: biome_lint
+        continue-on-error: true
 
-      - name: Check dependencies with depcruise
+      # Validate dependencies with dependency-cruiser - https://github.com/sverweij/dependency-cruiser
+      - name: Run Dependency-Cruise
         run: pnpm depcruise
-      
-      - name: Lint with ls-lint
-        run: pnpm ls-lint
\ No newline at end of file
+        id: depcruise
+        continue-on-error: true
+
+      # Validate types with tsc - https://www.typescriptlang.org/docs/handbook/compiler-options.html#using-the-cli
+      - name: Run Typecheck
+        run: pnpm typecheck
+        id: typecheck
+        continue-on-error: true
+
+      # The exact same thing
+      - name: Run Typecheck (scripts)
+        run: pnpm typecheck:scripts
+        id: typecheck-scripts
+        continue-on-error: true
+
+      - name: Evaluate for Errors
+        env:
+          BIOME_LINT_OUTCOME: ${{ steps.biome_lint.outcome }}
+          DEPCRUISE_OUTCOME: ${{ steps.depcruise.outcome }}
+          TYPECHECK_OUTCOME: ${{ steps.typecheck.outcome }}
+          TYPECHECK_SCRIPTS_OUTCOME: ${{ steps.typecheck-scripts.outcome }}
+        run: |
+            # Check for Errors
+
+            # Make text red.
+            red () {
+              printf "\e[31m%s\e[0m" "$1"
+            }
+
+            # Make text green.
+            green () {
+              printf "\e[32m%s\e[0m" "$1"
+            }
+
+            print_result() {
+              local name=$1
+              local outcome=$2
+              if [ "$outcome" == "success" ]; then
+                printf "$(green "✅ $name: $outcome")\n"
+              else
+                printf "$(red "❌ $name: $outcome")\n"
+              fi
+            }
+
+            print_result "Biome" "$BIOME_LINT_OUTCOME"
+            print_result "Depcruise" "$DEPCRUISE_OUTCOME"
+            print_result "Typecheck" "$TYPECHECK_OUTCOME"
+            print_result "Typecheck scripts" "$TYPECHECK_SCRIPTS_OUTCOME"
+
+            if [[ "$BIOME_LINT_OUTCOME" != "success" || \
+              "$DEPCRUISE_OUTCOME" != "success" || \
+              "$TYPECHECK_OUTCOME" != "success" || \
+              "$TYPECHECK_SCRIPTS_OUTCOME" != "success" ]]; then
+              printf "$(red "❌ One or more checks failed!")\n" >&2
+              exit 1
+            fi
+
+            printf "$(green "✅ All checks passed!")\n"
diff --git a/biome.jsonc b/biome.jsonc
index a63ce0ee07d..5a6de48bd0a 100644
--- a/biome.jsonc
+++ b/biome.jsonc
@@ -176,9 +176,10 @@
     },
 
     // Overrides to prevent unused import removal inside `overrides.ts` and enums files (for TSDoc linkcodes),
-    // as well as in all TS files in `scripts/` (which are assumed to be boilerplate templates).
+    // as well as inside script boilerplate files.
     {
-      "includes": ["**/src/overrides.ts", "**/src/enums/**/*", "**/scripts/**/*.ts", "**/*.d.ts"],
+      // TODO: Rename existing boilerplates in the folder and remove this last alias
+      "includes": ["**/src/overrides.ts", "**/src/enums/**/*", "scripts/**/*.boilerplate.ts", "**/boilerplates/*.ts"],
       "linter": {
         "rules": {
           "correctness": {
@@ -188,7 +189,7 @@
       }
     },
     {
-      "includes": ["**/src/overrides.ts", "**/scripts/**/*.ts"],
+      "includes": ["**/src/overrides.ts"],
       "linter": {
         "rules": {
           "style": {
diff --git a/package.json b/package.json
index d3ea890c005..8bc67d570a1 100644
--- a/package.json
+++ b/package.json
@@ -14,7 +14,9 @@
     "test:watch": "vitest watch --coverage --no-isolate",
     "test:silent": "vitest run --silent='passed-only' --no-isolate",
     "test:create": "node scripts/create-test/create-test.js",
+    "eggMoves:parse": "node scripts/parse-egg-moves/main.js",
     "typecheck": "tsc --noEmit",
+    "typecheck:scripts": "tsc -p scripts/jsconfig.json",
     "biome": "biome check --write --changed --no-errors-on-unmatched --diagnostic-level=error",
     "biome-ci": "biome ci --diagnostic-level=error --reporter=github --no-errors-on-unmatched",
     "docs": "typedoc",
diff --git a/scripts/create-test/create-test.js b/scripts/create-test/create-test.js
index 765993959d1..5e395783da7 100644
--- a/scripts/create-test/create-test.js
+++ b/scripts/create-test/create-test.js
@@ -156,7 +156,7 @@ async function runInteractive() {
     console.log(chalk.green.bold(`✔ File created at: test/${localDir}/${fileName}.test.ts\n`));
     console.groupEnd();
   } catch (err) {
-    console.error(chalk.red("✗ Error: ", err.message));
+    console.error(chalk.red("✗ Error: ", err));
   }
 }
 
diff --git a/scripts/decrypt-save.js b/scripts/decrypt-save.js
index e50f152f159..26b0a311378 100644
--- a/scripts/decrypt-save.js
+++ b/scripts/decrypt-save.js
@@ -1,7 +1,6 @@
 // Usage: node decrypt-save.js <encrypted-file> [save-file]
 
-// biome-ignore lint/performance/noNamespaceImport: This is how you import fs from node
-import * as fs from "node:fs";
+import fs from "node:fs";
 import crypto_js from "crypto-js";
 
 const { AES, enc } = crypto_js;
@@ -60,6 +59,11 @@ function decryptSave(path) {
   try {
     fileData = fs.readFileSync(path, "utf8");
   } catch (e) {
+    if (!(e instanceof Error)) {
+      console.error(`Unrecognized error: ${e}`);
+      process.exit(1);
+    }
+    // @ts-expect-error - e is usually a SystemError (all of which have codes)
     switch (e.code) {
       case "ENOENT":
         console.error(`File not found: ${path}`);
@@ -104,6 +108,13 @@ function writeToFile(filePath, data) {
   try {
     fs.writeFileSync(filePath, data);
   } catch (e) {
+    if (!(e instanceof Error)) {
+      console.error("Unknown error detected: ", e);
+      process.exitCode = 1;
+      return;
+    }
+
+    // @ts-expect-error - e is usually a SystemError (all of which have codes)
     switch (e.code) {
       case "EACCES":
         console.error(`Could not open ${filePath}: Permission denied`);
@@ -114,7 +125,8 @@ function writeToFile(filePath, data) {
       default:
         console.error(`Error writing file: ${e.message}`);
     }
-    process.exit(1);
+    process.exitCode = 1;
+    return;
   }
 }
 
diff --git a/scripts/jsconfig.json b/scripts/jsconfig.json
new file mode 100644
index 00000000000..aed71f4f576
--- /dev/null
+++ b/scripts/jsconfig.json
@@ -0,0 +1,17 @@
+{
+  "include": ["**/*.js"],
+  "compilerOptions": {
+    "allowJs": true,
+    "checkJs": true,
+    "rootDir": ".",
+    "target": "esnext",
+    "module": "nodenext",
+    "moduleResolution": "nodenext",
+    "erasableSyntaxOnly": true,
+    "strict": true,
+    "noEmit": true,
+    // Forcibly disable `node_modules` recursion to prevent TSC from typechecking random JS files.
+    // This is disabled by default in `tsconfig.json`, but needs to be explicitly disabled from the default of `2`
+    "maxNodeModuleJsDepth": 0
+  }
+}
diff --git a/scripts/parse-egg-moves/egg-move-template.boilerplate.ts b/scripts/parse-egg-moves/egg-move-template.boilerplate.ts
new file mode 100644
index 00000000000..bfac05f4bde
--- /dev/null
+++ b/scripts/parse-egg-moves/egg-move-template.boilerplate.ts
@@ -0,0 +1,10 @@
+//! DO NOT EDIT THIS FILE - CREATED BY THE `eggMoves:parse` script automatically
+import { MoveId } from "#enums/move-id";
+import { SpeciesId } from "#enums/species-id";
+
+/**
+ * An object mapping all base form {@linkcode SpeciesId}s to an array of {@linkcode MoveId}s corresponding
+ * to their current egg moves.
+ * Generated by the `eggMoves:parse` script using a CSV sourced from the current Balance Team spreadsheet.
+ */
+export const speciesEggMoves = "{{table}}";
diff --git a/scripts/parse-egg-moves/help-message.js b/scripts/parse-egg-moves/help-message.js
new file mode 100644
index 00000000000..397a28e5011
--- /dev/null
+++ b/scripts/parse-egg-moves/help-message.js
@@ -0,0 +1,17 @@
+import chalk from "chalk";
+
+/** Show help/usage text for the `eggMoves:parse` CLI. */
+export function showHelpText() {
+  console.log(`
+Usage: ${chalk.cyan("pnpm eggMoves:parse [options]")}
+If given no options, assumes ${chalk.blue("\`--interactive\`")}.
+If given only a file path, assumes ${chalk.blue("\`--file\`")}.
+
+${chalk.hex("#ffa500")("Options:")}
+  ${chalk.blue("-h, --help")}            Show this help message.
+  ${chalk.blue("-f, --file[=PATH]")}     Specify a path to a CSV file to read, or provide one from stdin.
+  ${chalk.blue("-t, --text[=TEXT]")}
+  ${chalk.blue("-c, --console[=TEXT]")}  Specify CSV text to read, or provide it from stdin.
+  ${chalk.blue("-i, --interactive")}     Run in interactive mode (default)
+`);
+}
diff --git a/scripts/parse-egg-moves/interactive.js b/scripts/parse-egg-moves/interactive.js
new file mode 100644
index 00000000000..68ee41e7900
--- /dev/null
+++ b/scripts/parse-egg-moves/interactive.js
@@ -0,0 +1,108 @@
+import fs from "fs";
+import chalk from "chalk";
+import inquirer from "inquirer";
+import { showHelpText } from "./help-message.js";
+
+/**
+ * @import { Option } from "./main.js"
+ */
+
+/**
+ * Prompt the user to interactively select an option (console/file) to retrieve the egg move CSV.
+ * @returns {Promise<Option>} The selected option with value
+ */
+export async function runInteractive() {
+  /** @type {"Console" | "File" | "Help" | "Exit"} */
+  const answer = await inquirer
+    .prompt([
+      {
+        type: "list",
+        name: "type",
+        message: "Select the method to obtain egg moves.",
+        choices: ["Console", "File", "Help", "Exit"],
+      },
+    ])
+    .then(a => a.type);
+
+  if (answer === "Exit") {
+    console.log("Exiting...");
+    process.exitCode = 1;
+    return { type: "Exit" };
+  }
+
+  if (answer === "Help") {
+    showHelpText();
+    return { type: "Exit" };
+  }
+
+  if (!["Console", "File"].includes(answer)) {
+    console.error(chalk.red("Please provide a valid type!"));
+    return await runInteractive();
+  }
+
+  return { type: answer, value: await promptForValue(answer) };
+}
+
+/**
+ * Prompt the user to give a value (either the direct CSV or the file path).
+ * @param {"Console" | "File"} type - The input method
+ * @returns {Promise<string>} A Promise resolving with the CSV/file path.
+ */
+function promptForValue(type) {
+  switch (type) {
+    case "Console":
+      return doPromptConsole();
+    case "File":
+      return getFilePath();
+  }
+}
+
+/**
+ * Prompt the user to enter a file path from the console.
+ * @returns {Promise<string>} The file path inputted by the user.
+ */
+async function getFilePath() {
+  return await inquirer
+    .prompt([
+      {
+        type: "input",
+        name: "path",
+        message: "Please enter the path to the egg move CSV file.",
+        validate: input => {
+          if (input.trim() === "") {
+            return "File path cannot be empty!";
+          }
+          if (!fs.existsSync(input)) {
+            return "File does not exist!";
+          }
+          return true;
+        },
+      },
+    ])
+    .then(answer => answer.path);
+}
+
+/**
+ * Prompt the user for CSV input from the console.
+ * @returns {Promise<string>} The CSV input from the user.
+ */
+async function doPromptConsole() {
+  return await inquirer
+    .prompt([
+      {
+        type: "input",
+        name: "csv",
+        message: "Please enter the egg move CSV text.",
+        validate: input => {
+          if (input.trim() === "") {
+            return "CSV text cannot be empty!";
+          }
+          if (!input.match(/^[^,]+(,[^,]+){4}$/gm)) {
+            return "CSV text malformed - should contain 5 consecutive comma-separated values per line!";
+          }
+          return true;
+        },
+      },
+    ])
+    .then(answer => answer.csv);
+}
diff --git a/scripts/parse-egg-moves/main.js b/scripts/parse-egg-moves/main.js
new file mode 100644
index 00000000000..a009c81a041
--- /dev/null
+++ b/scripts/parse-egg-moves/main.js
@@ -0,0 +1,168 @@
+/*
+ * This script accepts a CSV value or file path as input, parses the egg moves,
+ * and writes the output to a TypeScript file.
+ * It can be run interactively or with command line arguments.
+ * Usage: `pnpm eggMoves:parse`
+ */
+
+import fs from "node:fs";
+import path from "node:path";
+import { fileURLToPath } from "node:url";
+import chalk from "chalk";
+import { showHelpText } from "./help-message.js";
+import { runInteractive } from "./interactive.js";
+import { parseEggMoves } from "./parse.js";
+
+const version = "1.0.0";
+
+// Get the directory name of the current module file
+const __filename = fileURLToPath(import.meta.url);
+const __dirname = path.dirname(__filename);
+const projectRoot = path.join(__dirname, "..", "..");
+const templatePath = path.join(__dirname, "egg-move-template.ts");
+// TODO: Do we want this to be configurable?
+const eggMoveTargetPath = path.join(projectRoot, "src/data/balance/egg-moves.ts");
+
+/**
+ * @typedef {{type: "Console" | "File", value: string} | {type: "Exit"}}
+ * Option
+ * An option selected by the user.
+ */
+
+/**
+ * Runs the interactive eggMoves:parse CLI.
+ * @returns {Promise<void>}
+ */
+async function start() {
+  console.log(chalk.yellow(`🥚 Egg Move Parser - v${version}`));
+
+  if (process.argv.length > 4) {
+    console.error(
+      chalk.redBright.bold(
+        `✗ Error: Too many arguments provided!\nArgs: ${chalk.hex("#7310fdff")(process.argv.slice(2).join(" "))}`,
+      ),
+    );
+    showHelpText();
+    process.exitCode = 1;
+    return;
+  }
+
+  let csv = "";
+  const inputType = await parseArguments();
+  if (process.exitCode) {
+    // If exit code is non-zero, return to allow it to propagate up the chain.
+    return;
+  }
+  switch (inputType.type) {
+    case "Console":
+      csv = inputType.value;
+      break;
+    case "File":
+      csv = await fs.promises.readFile(inputType.value, "utf-8");
+      break;
+    case "Exit":
+      // Help screen triggered; break out
+      return;
+  }
+
+  await writeToFile(parseEggMoves(csv));
+}
+
+/**
+ * Handle the arguments passed to the script and obtain the CSV input type.
+ * @returns {Promise<{type: "Console" | "File", value: string} | {type: "Exit"}>} The input method selected by the user
+ */
+async function parseArguments() {
+  const args = process.argv.slice(2); // first 2 args are node and script name (irrelevant)
+
+  /** @type {string | undefined}  */
+  const arg = args[0].split("=")[0]; // Yoink everything up to the first "=" to get the raw command
+  switch (arg) {
+    case "-f":
+    case "--file":
+      return { type: "File", value: getArgValue() };
+    case "-t":
+    case "--text":
+    case "-c":
+    case "--console":
+      return { type: "Console", value: getArgValue() };
+    case "-h":
+    case "--help":
+      showHelpText();
+      process.exitCode = 0;
+      return { type: "Exit" };
+    case "--interactive":
+    case "-i":
+    case undefined:
+      return await runInteractive();
+    default:
+      // If no arguments are found, check if it's a file path
+      if (fs.existsSync(arg)) {
+        console.log(chalk.green(`Using file path from stdin: ${chalk.blue(arg)}`));
+        return { type: "File", value: arg };
+      }
+      badArgs();
+      return { type: "Exit" };
+  }
+}
+
+/**
+ * Get the value of the argument provided.
+ * @returns {string} The CSV or file path from the arguments
+ * @throws {Error} If arguments are malformed
+ */
+function getArgValue() {
+  // If the user provided a value as argument 2, take that as the argument.
+  // Otherwise, check the 1st argument to see if it contains an `=` and extract everything afterwards.
+  /** @type {string | undefined} */
+  let filePath = process.argv[3];
+  const equalsIndex = process.argv[2].indexOf("=");
+  if (equalsIndex > -1) {
+    // If arg 3 was aleady existing and someone used `=` notation to assign a property, throw an error.
+    filePath = filePath ? undefined : process.argv[2].slice(equalsIndex + 1);
+  }
+
+  if (!filePath?.trim()) {
+    badArgs();
+    return "";
+  }
+  // NB: It doesn't really matter that this can be `undefined` - we'll always break out by lieu of setting the exit code
+  return filePath;
+}
+
+/**
+ * Write out the parsed CSV to a file.
+ * @param {string} moves - The parsed CSV
+ * @returns {Promise<void>}
+ */
+export async function writeToFile(moves) {
+  try {
+    // Read the template file, replacing the placeholder with the move table.
+    const content = fs.readFileSync(templatePath, "utf8").replace(`"{{table}}"`, moves);
+
+    if (fs.existsSync(eggMoveTargetPath)) {
+      console.warn(chalk.hex("#ffa500")("\nEgg moves file already exists, overwriting...\n"));
+    }
+
+    // Write the template content to the file
+    fs.writeFileSync(eggMoveTargetPath, content, "utf8");
+
+    console.log(chalk.green.bold(`\n✔ Egg Moves written to ${eggMoveTargetPath}`));
+    console.groupEnd();
+  } catch (err) {
+    console.error(chalk.red(`✗ Error while writing egg moves: ${err}`));
+    process.exitCode = 1;
+  }
+}
+
+/**
+ * Do logging for incorrect or malformed CLI arguments.
+ * @returns {void}
+ */
+function badArgs() {
+  chalk.red.bold(`✗ Error: Malformed arguments!\nArgs: ${chalk.hex("#7310fdff")(process.argv.slice(2).join(" "))}`);
+  showHelpText();
+  process.exitCode = 1;
+}
+
+start();
diff --git a/scripts/parse-egg-moves/parse.js b/scripts/parse-egg-moves/parse.js
new file mode 100644
index 00000000000..fe7511f8b08
--- /dev/null
+++ b/scripts/parse-egg-moves/parse.js
@@ -0,0 +1,79 @@
+import chalk from "chalk";
+
+/**
+ * A single line of the inputted CSV.
+ * @typedef {[speciesName: string, move1: string, move2: string, move3: string, move4: string]}
+ * CSVLine
+ */
+
+/**
+ * Regex to determine if a string follows the required CSV format.
+ */
+const csvRegex = /^((?:[^,]+?,){4}(?:\w|\s)+?,?\n?)+$/g;
+
+/**
+ * Given a CSV string, parse it and return a structured table ready to be inputted into code.
+ * @param {string} csv - The formatted CSV string.
+ * @returns {string} The fully formatted table.
+ */
+export function parseEggMoves(csv) {
+  console.log(chalk.grey("⚙️ Parsing egg moves..."));
+  if (!csvRegex.test(csv)) {
+    console.error(chalk.redBright("! Input was not proper CSV!"));
+    process.exitCode = 1;
+    return "";
+  }
+
+  let output = "{\n";
+
+  const lines = csv.split(/\n/g);
+
+  for (const line of lines) {
+    /**
+     * The individual CSV column for this species.
+     */
+    const cols =
+      /** @type {CSVLine} */
+      (line.split(",").slice(0, 5));
+    const speciesName = toUpperSnakeCase(cols[0]);
+
+    const eggMoves =
+      /** @type {string[]} */
+      ([]);
+
+    for (let m = 1; m < 5; m++) {
+      const moveName = cols[m].trim();
+      if (!moveName || moveName === "N/A") {
+        console.warn(`Species ${speciesName} missing ${m}th egg move!`);
+        eggMoves.push("MoveId.NONE");
+        continue;
+      }
+
+      // Remove (N) and (P) from the ends of move names before UPPER_SNAKE_CASE-ing them
+      const moveNameTitle = toUpperSnakeCase(moveName.replace(/ \([A-Z]\)$/, ""));
+      eggMoves.push("MoveId." + moveNameTitle);
+    }
+
+    if (eggMoves.every(move => move === "MoveId.NONE")) {
+      console.warn(`Species ${speciesName} could not be parsed, excluding from output...`);
+      output += `  // [SpeciesId.${speciesName}]: [ MoveId.NONE, MoveId.NONE, MoveId.NONE, MoveId.NONE ],\n`;
+    } else {
+      output += `  [SpeciesId.${speciesName}]: [ ${eggMoves.join(", ")} ],\n`;
+    }
+  }
+
+  // NB: We omit the semicolon as it is contained in the template string itself
+  return output + "} satisfies Partial<Record<SpeciesId, [MoveId, MoveId, MoveId, MoveId]>>";
+}
+
+/**
+ * Helper method to convert a string into `UPPER_SNAKE_CASE`.
+ * @param {string} str - The string being converted
+ * @returns {string} The result of converting `str` into upper snake case.
+ */
+function toUpperSnakeCase(str) {
+  return str
+    .split(/[_ -]+/g)
+    .map(word => word.toUpperCase())
+    .join("_");
+}
diff --git a/src/data/balance/egg-moves.ts b/src/data/balance/egg-moves.ts
index e936afcdc08..6831f035515 100644
--- a/src/data/balance/egg-moves.ts
+++ b/src/data/balance/egg-moves.ts
@@ -1,9 +1,12 @@
-import { allMoves } from "#data/data-lists";
+//! DO NOT EDIT THIS FILE - CREATED BY THE `eggMoves:parse` script automatically
 import { MoveId } from "#enums/move-id";
 import { SpeciesId } from "#enums/species-id";
-import { getEnumKeys, getEnumValues } from "#utils/enums";
-import { toTitleCase } from "#utils/strings";
 
+/**
+ * An object mapping all base form {@linkcode SpeciesId}s to an array of {@linkcode MoveId}s corresponding
+ * to their current egg moves.
+ * Generated by the `eggMoves:parse` script using a CSV sourced from the current Balance Team spreadsheet.
+ */
 export const speciesEggMoves = {
   [SpeciesId.BULBASAUR]: [ MoveId.SAPPY_SEED, MoveId.MALIGNANT_CHAIN, MoveId.EARTH_POWER, MoveId.MATCHA_GOTCHA ],
   [SpeciesId.CHARMANDER]: [ MoveId.DRAGON_DANCE, MoveId.BITTER_BLADE, MoveId.EARTH_POWER, MoveId.OBLIVION_WING ],
@@ -582,55 +585,4 @@ export const speciesEggMoves = {
   [SpeciesId.PALDEA_TAUROS]: [ MoveId.NO_RETREAT, MoveId.BLAZING_TORQUE, MoveId.AQUA_STEP, MoveId.THUNDEROUS_KICK ],
   [SpeciesId.PALDEA_WOOPER]: [ MoveId.STONE_AXE, MoveId.RECOVER, MoveId.BANEFUL_BUNKER, MoveId.BARB_BARRAGE ],
   [SpeciesId.BLOODMOON_URSALUNA]: [ MoveId.NASTY_PLOT, MoveId.ROCK_POLISH, MoveId.SANDSEAR_STORM, MoveId.BOOMBURST ]
-};
-
-/**
- * Parse a CSV-separated list of Egg Moves (such as one sourced from a Google Sheets)
- * into code able to form the `speciesEggMoves` const object as above.
- * @param content - The CSV-formatted string to convert into code.
- */
-// TODO: Move this into the scripts folder and stop running it on initialization
-function parseEggMoves(content: string): void {
-  let output = "";
-
-  const speciesNames = getEnumKeys(SpeciesId);
-  const speciesValues = getEnumValues(SpeciesId);
-  const moveNames = allMoves.map(m => m.name.replace(/ \([A-Z]\)$/, "").toLowerCase());
-  const lines = content.split(/\n/g);
-
-  for (const line of lines) {
-    const cols = line.split(",").slice(0, 5);
-    const enumSpeciesName = cols[0].toUpperCase().replace(/[ -]/g, "_") as keyof typeof SpeciesId;
-    // TODO: This should use reverse mapping instead of `indexOf`
-    const species = speciesValues[speciesNames.indexOf(enumSpeciesName)];
-
-    const eggMoves: MoveId[] = [];
-
-    for (let m = 0; m < 4; m++) {
-      const moveName = cols[m + 1].trim();
-      const moveIndex = moveName !== "N/A" ? moveNames.indexOf(moveName.toLowerCase()) : -1;
-      if (moveIndex === -1) {
-        console.warn(moveName, "could not be parsed");
-      }
-
-      eggMoves.push(moveIndex > -1 ? moveIndex as MoveId : MoveId.NONE);
-    }
-
-    if (eggMoves.every(m => m === MoveId.NONE)) {
-      console.warn(`Species ${toTitleCase(SpeciesId[species])} could not be parsed, excluding from output...`)
-    } else {
-      output += `[SpeciesId.${SpeciesId[species]}]: [ ${eggMoves.map(m => `MoveId.${MoveId[m]}`).join(", ")} ],\n`;
-    }
-  }
-
-  console.log(output);
-}
-
-export function initEggMoves() {
-  const eggMovesStr = "";
-  if (eggMovesStr) {
-    setTimeout(() => {
-      parseEggMoves(eggMovesStr);
-    }, 1000);
-  }
-}
+} satisfies Partial<Record<SpeciesId, [MoveId, MoveId, MoveId, MoveId]>>;
diff --git a/src/init/init.ts b/src/init/init.ts
index ba9738e2be8..8452278b3f1 100644
--- a/src/init/init.ts
+++ b/src/init/init.ts
@@ -1,6 +1,5 @@
 import { initAbilities } from "#abilities/ability";
 import { initBiomes } from "#balance/biomes";
-import { initEggMoves } from "#balance/egg-moves";
 import { initPokemonPrevolutions, initPokemonStarters } from "#balance/pokemon-evolutions";
 import { initSpecies } from "#balance/pokemon-species";
 import { initChallenges } from "#data/challenge";
@@ -24,7 +23,6 @@ export function initializeGame() {
   initPokemonPrevolutions();
   initPokemonStarters();
   initBiomes();
-  initEggMoves();
   initPokemonForms();
   initTrainerTypeDialogue();
   initSpecies();
diff --git a/test/@types/vitest.d.ts b/test/@types/vitest.d.ts
index 21cf76ed352..f88a57f4dfb 100644
--- a/test/@types/vitest.d.ts
+++ b/test/@types/vitest.d.ts
@@ -1,7 +1,4 @@
 import type { TerrainType } from "#app/data/terrain";
-import type Overrides from "#app/overrides";
-import type { ArenaTag } from "#data/arena-tag";
-import type { PositionalTag } from "#data/positional-tags/positional-tag";
 import type { AbilityId } from "#enums/ability-id";
 import type { ArenaTagSide } from "#enums/arena-tag-side";
 import type { ArenaTagType } from "#enums/arena-tag-type";
@@ -9,12 +6,8 @@ import type { BattlerTagType } from "#enums/battler-tag-type";
 import type { MoveId } from "#enums/move-id";
 import type { PokemonType } from "#enums/pokemon-type";
 import type { PositionalTagType } from "#enums/positional-tag-type";
-import type { BattleStat, EffectiveStat, Stat } from "#enums/stat";
-import type { StatusEffect } from "#enums/status-effect";
+import type { BattleStat, EffectiveStat } from "#enums/stat";
 import type { WeatherType } from "#enums/weather-type";
-import type { Arena } from "#field/arena";
-import type { Pokemon } from "#field/pokemon";
-import type { PokemonMove } from "#moves/pokemon-move";
 import type { toHaveArenaTagOptions } from "#test/test-utils/matchers/to-have-arena-tag";
 import type { toHaveEffectiveStatOptions } from "#test/test-utils/matchers/to-have-effective-stat";
 import type { toHavePositionalTagOptions } from "#test/test-utils/matchers/to-have-positional-tag";
@@ -22,8 +15,6 @@ import type { expectedStatusType } from "#test/test-utils/matchers/to-have-statu
 import type { toHaveTypesOptions } from "#test/test-utils/matchers/to-have-types";
 import type { TurnMove } from "#types/turn-move";
 import type { AtLeastOne } from "#types/type-helpers";
-import type { toDmgValue } from "utils/common";
-import type { expect } from "vitest";
 
 declare module "vitest" {
   interface Assertion<T> {
diff --git a/test/test-utils/helpers/challenge-mode-helper.ts b/test/test-utils/helpers/challenge-mode-helper.ts
index a8a9ff89de6..63dd4c657ac 100644
--- a/test/test-utils/helpers/challenge-mode-helper.ts
+++ b/test/test-utils/helpers/challenge-mode-helper.ts
@@ -1,5 +1,6 @@
 import overrides from "#app/overrides";
 import type { Challenge } from "#data/challenge";
+import { copyChallenge } from "#data/challenge";
 import { BattleStyle } from "#enums/battle-style";
 import type { Challenges } from "#enums/challenges";
 import type { SpeciesId } from "#enums/species-id";
@@ -10,7 +11,6 @@ import { SelectStarterPhase } from "#phases/select-starter-phase";
 import { TurnInitPhase } from "#phases/turn-init-phase";
 import { generateStarter } from "#test/test-utils/game-manager-utils";
 import { GameManagerHelper } from "#test/test-utils/helpers/game-manager-helper";
-import { copyChallenge } from "data/challenge";
 
 /**
  * Helper to handle Challenge mode specifics
diff --git a/tsconfig.json b/tsconfig.json
index dcbf7456df8..1b212c49bcf 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -18,46 +18,46 @@
     "esModuleInterop": true,
     "strictNullChecks": true,
     "sourceMap": false,
-    "checkJs": true,
     "strict": false, // TODO: Enable this eventually
     "rootDir": ".",
-    "baseUrl": "./src",
-    "paths": {
-      "#abilities/*": ["./data/abilities/*.ts"],
-      "#api/*": ["./plugins/api/*.ts"],
-      "#balance/*": ["./data/balance/*.ts"],
-      "#enums/*": ["./enums/*.ts"],
-      "#events/*": ["./events/*.ts"],
-      "#field/*": ["./field/*.ts"],
-      "#inputs/*": ["./configs/inputs/*.ts"],
-      "#modifiers/*": ["./modifier/*.ts"],
-      "#moves/*": ["./data/moves/*.ts"],
-      "#mystery-encounters/*": [
-        "./data/mystery-encounters/utils/*.ts",
-        "./data/mystery-encounters/encounters/*.ts",
-        "./data/mystery-encounters/requirements/*.ts",
-        "./data/mystery-encounters/*.ts"
-      ],
-      "#package.json": ["../package.json"],
-      "#phases/*": ["./phases/*.ts"],
-      "#plugins/*": ["./plugins/vite/*.ts", "./plugins/*.ts"],
-      "#sprites/*": ["./sprites/*.ts"],
-      "#system/*": [
-        "./system/settings/*.ts",
-        "./system/version-migration/versions/*.ts",
-        "./system/version-migration/*.ts",
-        "./system/*.ts"
-      ],
-      "#trainers/*": ["./data/trainers/*.ts"],
-      "#types/*": ["./@types/helpers/*.ts", "./@types/*.ts", "./typings/phaser/*.ts"],
-      "#ui/*": ["./ui/battle-info/*.ts", "./ui/settings/*.ts", "./ui/*.ts"],
-      "#utils/*": ["./utils/*.ts"],
-      "#data/*": ["./data/pokemon-forms/*.ts", "./data/pokemon/*.ts", "./data/*.ts"],
-      "#test/*": ["../test/*.ts"],
-      "#app/*": ["*.ts"]
-    },
     "outDir": "./build",
-    "noEmit": true
+    "noEmit": true,
+    "paths": {
+      "#abilities/*": ["./src/data/abilities/*.ts"],
+      "#api/*": ["./src/plugins/api/*.ts"],
+      "#balance/*": ["./src/data/balance/*.ts"],
+      "#enums/*": ["./src/enums/*.ts"],
+      "#events/*": ["./src/events/*.ts"],
+      "#field/*": ["./src/field/*.ts"],
+      "#inputs/*": ["./src/configs/inputs/*.ts"],
+      "#modifiers/*": ["./src/modifier/*.ts"],
+      "#moves/*": ["./src/data/moves/*.ts"],
+      "#mystery-encounters/*": [
+        "./src/data/mystery-encounters/utils/*.ts",
+        "./src/data/mystery-encounters/encounters/*.ts",
+        "./src/data/mystery-encounters/requirements/*.ts",
+        "./src/data/mystery-encounters/*.ts"
+      ],
+      "#package.json": ["./package.json"],
+      "#phases/*": ["./src/phases/*.ts"],
+      "#plugins/*": ["./src/plugins/vite/*.ts", "./src/plugins/*.ts"],
+      "#sprites/*": ["./src/sprites/*.ts"],
+      "#system/*": [
+        "./src/system/settings/*.ts",
+        "./src/system/version-migration/versions/*.ts",
+        "./src/system/version-migration/*.ts",
+        "./src/system/*.ts"
+      ],
+      "#trainers/*": ["./src/data/trainers/*.ts"],
+      "#types/*": ["./src/@types/helpers/*.ts", "./src/@types/*.ts", "./src/typings/phaser/*.ts"],
+      "#ui/*": ["./src/ui/battle-info/*.ts", "./src/ui/settings/*.ts", "./src/ui/*.ts"],
+      "#utils/*": ["./src/utils/*.ts"],
+      "#data/*": ["./src/data/pokemon-forms/*.ts", "./src/data/pokemon/*.ts", "./src/data/*.ts"],
+      "#test/*": ["./test/*.ts"],
+      "#app/*": ["./src/*.ts"]
+    }
   },
+  // Exclude checking for script JS files as those are covered by the folder's `jsconfig.json`
+  "include": ["**/*.ts", "**/*.d.ts"],
   "exclude": ["node_modules", "dist", "vite.config.ts", "vitest.config.ts", "vitest.workspace.ts"]
 }