diff --git a/public/images/events/pkmnday2025event-de.png b/public/images/events/pkmnday2025event-de.png
new file mode 100644
index 00000000000..4cc53546752
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diff --git a/public/images/events/pkmnday2025event-en.png b/public/images/events/pkmnday2025event-en.png
new file mode 100644
index 00000000000..e9caa9e19d6
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diff --git a/public/images/events/pkmnday2025event-es-ES.png b/public/images/events/pkmnday2025event-es-ES.png
new file mode 100644
index 00000000000..e1ab096dffc
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diff --git a/public/images/events/pkmnday2025event-fr.png b/public/images/events/pkmnday2025event-fr.png
new file mode 100644
index 00000000000..037d1e06e61
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diff --git a/public/images/events/pkmnday2025event-it.png b/public/images/events/pkmnday2025event-it.png
new file mode 100644
index 00000000000..f38a60330fa
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diff --git a/public/images/events/pkmnday2025event-ja.png b/public/images/events/pkmnday2025event-ja.png
new file mode 100644
index 00000000000..94b02ad93a0
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diff --git a/public/images/events/pkmnday2025event-ko.png b/public/images/events/pkmnday2025event-ko.png
new file mode 100644
index 00000000000..aed9ee3fb28
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diff --git a/public/images/events/pkmnday2025event-pt-BR.png b/public/images/events/pkmnday2025event-pt-BR.png
new file mode 100644
index 00000000000..2190bbac535
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diff --git a/public/images/events/pkmnday2025event-zh-CN.png b/public/images/events/pkmnday2025event-zh-CN.png
new file mode 100644
index 00000000000..a3430482dd0
Binary files /dev/null and b/public/images/events/pkmnday2025event-zh-CN.png differ
diff --git a/public/images/pokemon/656.png b/public/images/pokemon/656.png
index 6acfe282dca..06a9cd58268 100644
Binary files a/public/images/pokemon/656.png and b/public/images/pokemon/656.png differ
diff --git a/public/images/pokemon/variant/656.json b/public/images/pokemon/variant/656.json
index 68743a4c9f1..5037f86f22a 100644
--- a/public/images/pokemon/variant/656.json
+++ b/public/images/pokemon/variant/656.json
@@ -3,12 +3,12 @@
 		"838394": "4d7dc5",
 		"62ace6": "8363af",
 		"7bcdff": "9c75c2",
-		"ffec8c": "ddfff9",
+		"fdea88": "ddfff9",
 		"a1a1c4": "7ab7ec",
 		"c9b241": "97d6e2",
-		"dfcf77": "bae7e8",
+		"ccbd70": "bae7e8",
 		"174592": "37408c",
-		"fdfdfd": "b1e5ff",
+		"f8f8f8": "b1e5ff",
 		"9c9cc5": "5385c7",
 		"cdcde6": "7eb7e8",
 		"396a83": "362864",
@@ -18,12 +18,12 @@
 		"838394": "cc6845",
 		"62ace6": "c44848",
 		"7bcdff": "dd6155",
-		"ffec8c": "ddfff9",
+		"fdea88": "ddfff9",
 		"a1a1c4": "f7c685",
 		"c9b241": "97d6e2",
-		"dfcf77": "bae7e8",
+		"ccbd70": "bae7e8",
 		"174592": "198158",
-		"fdfdfd": "fff4bd",
+		"f8f8f8": "fff4bd",
 		"9c9cc5": "c96a48",
 		"cdcde6": "f7b785",
 		"396a83": "5c0d33",
diff --git a/public/images/pokemon/variant/back/656.json b/public/images/pokemon/variant/back/656.json
index 34b11bfab78..f41398f3154 100644
--- a/public/images/pokemon/variant/back/656.json
+++ b/public/images/pokemon/variant/back/656.json
@@ -1,17 +1,17 @@
 {
 	"1": {
-		"838394": "4d7dc5",
+		"848496": "4d7dc5",
 		"7bcdff": "9c75c2",
 		"62ace6": "8363af",
 		"ffffff": "b1e5ff",
 		"396a83": "362864",
 		"9c9cc5": "5385c7",
 		"cdcde6": "7eb7e8",
-		"174592": "198158",
+		"174592": "37408c",
 		"5a94cd": "7054a4"
 	},
 	"2": {
-		"838394": "cc6845",
+		"848496": "cc6845",
 		"7bcdff": "dd6155",
 		"62ace6": "c44848",
 		"ffffff": "fff4bd",
diff --git a/src/data/balance/starters.ts b/src/data/balance/starters.ts
index 10263f895b3..3468163c988 100644
--- a/src/data/balance/starters.ts
+++ b/src/data/balance/starters.ts
@@ -461,7 +461,7 @@ export const speciesStarterCosts = {
   [Species.GUZZLORD]: 6,
   [Species.NECROZMA]: 8,
   [Species.MAGEARNA]: 7,
-  [Species.MARSHADOW]: 7,
+  [Species.MARSHADOW]: 8,
   [Species.POIPOLE]: 8,
   [Species.STAKATAKA]: 6,
   [Species.BLACEPHALON]: 7,
diff --git a/src/loading-scene.ts b/src/loading-scene.ts
index 42b6d0ced11..183b38c49e5 100644
--- a/src/loading-scene.ts
+++ b/src/loading-scene.ts
@@ -251,9 +251,9 @@ export class LoadingScene extends SceneBase {
     }
     const availableLangs = [ "en", "de", "it", "fr", "ja", "ko", "es-ES", "pt-BR", "zh-CN" ];
     if (lang && availableLangs.includes(lang)) {
-      this.loadImage("valentines2025event-" + lang, "events");
+      this.loadImage("pkmnday2025event-" + lang, "events");
     } else {
-      this.loadImage("valentines2025event-en", "events");
+      this.loadImage("pkmnday2025event-en", "events");
     }
 
     this.loadAtlas("statuses", "");
diff --git a/src/modifier/modifier-type.ts b/src/modifier/modifier-type.ts
index 112a3c9aa35..ae8b9a45c0d 100644
--- a/src/modifier/modifier-type.ts
+++ b/src/modifier/modifier-type.ts
@@ -2554,7 +2554,7 @@ export function getPartyLuckValue(party: Pokemon[]): number {
     return DailyLuck.value;
   }
   const eventSpecies = globalScene.eventManager.getEventLuckBoostedSpecies();
-  const luck = Phaser.Math.Clamp(party.map(p => p.isAllowedInBattle() ? p.getLuck() + (eventSpecies.includes(p.species.speciesId) ? 3 : 0) : 0)
+  const luck = Phaser.Math.Clamp(party.map(p => p.isAllowedInBattle() ? p.getLuck() + (eventSpecies.includes(p.species.speciesId) ? 1 : 0) : 0)
     .reduce((total: number, value: number) => total += value, 0), 0, 14);
   return Math.min(globalScene.eventManager.getEventLuckBoost() + (luck ?? 0), 14);
 }
diff --git a/src/system/version_migration/versions/v1_7_0.ts b/src/system/version_migration/versions/v1_7_0.ts
index 2acb9d8151a..bdb9e6aab9f 100644
--- a/src/system/version_migration/versions/v1_7_0.ts
+++ b/src/system/version_migration/versions/v1_7_0.ts
@@ -1,8 +1,29 @@
-import { getPokemonSpeciesForm } from "#app/data/pokemon-species";
-import type { SessionSaveData } from "#app/system/game-data";
+import { getPokemonSpecies, getPokemonSpeciesForm } from "#app/data/pokemon-species";
+import { globalScene } from "#app/global-scene";
+import { DexAttr, type SessionSaveData, type SystemSaveData } from "#app/system/game-data";
 import * as Utils from "#app/utils";
 
-export const systemMigrators = [] as const;
+export const systemMigrators = [
+  /**
+   * If a starter is caught, but the only forms registered as caught are not starterSelectable,
+   * unlock the default form.
+   * @param data {@linkcode SystemSaveData}
+   */
+  function migrateUnselectableForms(data: SystemSaveData) {
+    if (data.starterData && data.dexData) {
+      Object.keys(data.starterData).forEach(sd => {
+        const caughtAttr = data.dexData[sd]?.caughtAttr;
+        const species = getPokemonSpecies(Number(sd));
+        if (caughtAttr && species.forms?.length > 1) {
+          const selectableForms = species.forms.filter((form, formIndex) => form.isStarterSelectable && (caughtAttr & globalScene.gameData.getFormAttr(formIndex)));
+          if (selectableForms.length === 0) {
+            data.dexData[sd].caughtAttr += DexAttr.DEFAULT_FORM;
+          }
+        }
+      });
+    }
+  },
+] as const;
 
 export const settingsMigrators = [] as const;
 
diff --git a/src/timed-event-manager.ts b/src/timed-event-manager.ts
index bebacf87ebc..c12f9d569c0 100644
--- a/src/timed-event-manager.ts
+++ b/src/timed-event-manager.ts
@@ -169,7 +169,7 @@ const timedEvents: TimedEvent[] = [
       { species: Species.WOOBAT },
       { species: Species.FRILLISH },
       { species: Species.ALOMOMOLA },
-      { species: Species.FURFROU, formIndex: 1 }, // Heart trim
+      { species: Species.FURFROU, formIndex: 1 }, // Heart Trim
       { species: Species.ESPURR },
       { species: Species.SPRITZEE },
       { species: Species.SWIRLIX },
@@ -180,6 +180,33 @@ const timedEvents: TimedEvent[] = [
       { species: Species.ENAMORUS }
     ],
     luckBoostedSpecies: [ Species.LUVDISC ]
+  },
+  {
+    name: "PKMNDAY2025",
+    eventType: EventType.LUCK,
+    startDate: new Date(Date.UTC(2025, 1, 27)),
+    endDate: new Date(Date.UTC(2025, 2, 4)),
+    classicFriendshipMultiplier: 4,
+    bannerKey: "pkmnday2025event-",
+    scale: 0.21,
+    availableLangs: [ "en", "de", "it", "fr", "ja", "ko", "es-ES", "pt-BR", "zh-CN" ],
+    eventEncounters: [
+      { species: Species.PIKACHU, formIndex: 1, blockEvolution: true }, // Partner Form
+      { species: Species.EEVEE, formIndex: 1, blockEvolution: true }, // Partner Form
+      { species: Species.CHIKORITA },
+      { species: Species.TOTODILE },
+      { species: Species.TEPIG }
+    ],
+    luckBoostedSpecies: [
+      Species.PICHU, Species.PIKACHU, Species.RAICHU, Species.ALOLA_RAICHU,
+      Species.PSYDUCK, Species.GOLDUCK,
+      Species.EEVEE, Species.FLAREON, Species.JOLTEON, Species.VAPOREON, Species.ESPEON, Species.UMBREON, Species.LEAFEON, Species.GLACEON, Species.SYLVEON,
+      Species.CHIKORITA, Species.BAYLEEF, Species.MEGANIUM,
+      Species.TOTODILE, Species.CROCONAW, Species.FERALIGATR,
+      Species.TEPIG, Species.PIGNITE, Species.EMBOAR,
+      Species.ZYGARDE,
+      Species.ETERNAL_FLOETTE
+    ]
   }
 ];