diff --git a/src/field/pokemon.ts b/src/field/pokemon.ts
index 703e890e555..f42b05bd8de 100644
--- a/src/field/pokemon.ts
+++ b/src/field/pokemon.ts
@@ -213,7 +213,6 @@ export abstract class Pokemon extends Phaser.GameObjects.Container {
    * TODO: Stop treating this like a unique ID and stop treating 0 as no pokemon
    */
   public id: number;
-  public name: string;
   public nickname: string;
   public species: PokemonSpecies;
   public formIndex: number;
@@ -5665,7 +5664,7 @@ export abstract class Pokemon extends Phaser.GameObjects.Container {
 }
 
 export class PlayerPokemon extends Pokemon {
-  protected battleInfo: PlayerBattleInfo;
+  protected declare battleInfo: PlayerBattleInfo;
   public compatibleTms: MoveId[];
 
   constructor(
@@ -6194,7 +6193,7 @@ export class PlayerPokemon extends Pokemon {
 }
 
 export class EnemyPokemon extends Pokemon {
-  protected battleInfo: EnemyBattleInfo;
+  protected declare battleInfo: EnemyBattleInfo;
   public trainerSlot: TrainerSlot;
   public aiType: AiType;
   public bossSegments: number;
diff --git a/src/field/trainer.ts b/src/field/trainer.ts
index a8af298e1cf..584c9310932 100644
--- a/src/field/trainer.ts
+++ b/src/field/trainer.ts
@@ -30,7 +30,6 @@ export class Trainer extends Phaser.GameObjects.Container {
   public config: TrainerConfig;
   public variant: TrainerVariant;
   public partyTemplateIndex: number;
-  public name: string;
   public partnerName: string;
   public nameKey: string;
   public partnerNameKey: string | undefined;
diff --git a/src/modifier/modifier.ts b/src/modifier/modifier.ts
index f6a9ed48847..b31bee7fc69 100644
--- a/src/modifier/modifier.ts
+++ b/src/modifier/modifier.ts
@@ -462,7 +462,7 @@ export abstract class LapsingPersistentModifier extends PersistentModifier {
  * @see {@linkcode apply}
  */
 export class DoubleBattleChanceBoosterModifier extends LapsingPersistentModifier {
-  public override type: DoubleBattleChanceBoosterModifierType;
+  public declare type: DoubleBattleChanceBoosterModifierType;
 
   match(modifier: Modifier): boolean {
     return modifier instanceof DoubleBattleChanceBoosterModifier && modifier.getMaxBattles() === this.getMaxBattles();
@@ -936,7 +936,7 @@ export class EvoTrackerModifier extends PokemonHeldItemModifier {
  * Currently used by Shuckle Juice item
  */
 export class PokemonBaseStatTotalModifier extends PokemonHeldItemModifier {
-  public override type: PokemonBaseStatTotalModifierType;
+  public declare type: PokemonBaseStatTotalModifierType;
   public isTransferable = false;
   public statModifier: 10 | -15;
 
@@ -2074,7 +2074,7 @@ export abstract class ConsumablePokemonModifier extends ConsumableModifier {
 }
 
 export class TerrastalizeModifier extends ConsumablePokemonModifier {
-  public override type: TerastallizeModifierType;
+  public declare type: TerastallizeModifierType;
   public teraType: PokemonType;
 
   constructor(type: TerastallizeModifierType, pokemonId: number, teraType: PokemonType) {
@@ -2318,7 +2318,7 @@ export class PokemonLevelIncrementModifier extends ConsumablePokemonModifier {
 }
 
 export class TmModifier extends ConsumablePokemonModifier {
-  public override type: TmModifierType;
+  public declare type: TmModifierType;
 
   /**
    * Applies {@linkcode TmModifier}
@@ -2365,7 +2365,7 @@ export class RememberMoveModifier extends ConsumablePokemonModifier {
 }
 
 export class EvolutionItemModifier extends ConsumablePokemonModifier {
-  public override type: EvolutionItemModifierType;
+  public declare type: EvolutionItemModifierType;
   /**
    * Applies {@linkcode EvolutionItemModifier}
    * @param playerPokemon The {@linkcode PlayerPokemon} that should evolve via item
@@ -2530,7 +2530,7 @@ export class ExpBoosterModifier extends PersistentModifier {
 }
 
 export class PokemonExpBoosterModifier extends PokemonHeldItemModifier {
-  public override type: PokemonExpBoosterModifierType;
+  public declare type: PokemonExpBoosterModifierType;
 
   private boostMultiplier: number;
 
@@ -2627,7 +2627,7 @@ export class ExpBalanceModifier extends PersistentModifier {
 }
 
 export class PokemonFriendshipBoosterModifier extends PokemonHeldItemModifier {
-  public override type: PokemonFriendshipBoosterModifierType;
+  public declare type: PokemonFriendshipBoosterModifierType;
 
   matchType(modifier: Modifier): boolean {
     return modifier instanceof PokemonFriendshipBoosterModifier;
@@ -2684,7 +2684,7 @@ export class PokemonNatureWeightModifier extends PokemonHeldItemModifier {
 }
 
 export class PokemonMoveAccuracyBoosterModifier extends PokemonHeldItemModifier {
-  public override type: PokemonMoveAccuracyBoosterModifierType;
+  public declare type: PokemonMoveAccuracyBoosterModifierType;
   private accuracyAmount: number;
 
   constructor(type: PokemonMoveAccuracyBoosterModifierType, pokemonId: number, accuracy: number, stackCount?: number) {
@@ -2736,7 +2736,7 @@ export class PokemonMoveAccuracyBoosterModifier extends PokemonHeldItemModifier
 }
 
 export class PokemonMultiHitModifier extends PokemonHeldItemModifier {
-  public override type: PokemonMultiHitModifierType;
+  public declare type: PokemonMultiHitModifierType;
 
   matchType(modifier: Modifier): boolean {
     return modifier instanceof PokemonMultiHitModifier;
@@ -2817,7 +2817,7 @@ export class PokemonMultiHitModifier extends PokemonHeldItemModifier {
 }
 
 export class PokemonFormChangeItemModifier extends PokemonHeldItemModifier {
-  public override type: FormChangeItemModifierType;
+  public declare type: FormChangeItemModifierType;
   public formChangeItem: FormChangeItem;
   public active: boolean;
   public isTransferable = false;
diff --git a/tsconfig.json b/tsconfig.json
index 1e067dcff03..9aa06829789 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -1,11 +1,11 @@
 {
   "compilerOptions": {
-    "target": "ES2020",
-    "module": "ES2020",
+    "target": "ES2023",
+    "module": "ES2022",
     // Modifying this option requires all values to be set manually because the defaults get overridden
-    // Values other than "ES2024.Promise" taken from https://github.com/microsoft/TypeScript/blob/main/src/lib/es2020.full.d.ts
+    // Values other than "ES2024.Promise" taken from https://github.com/microsoft/TypeScript/blob/main/src/lib/es2023.full.d.ts
     "lib": [
-      "ES2020",
+      "ES2023",
       "ES2024.Promise",
       "DOM",
       "DOM.AsyncIterable",