diff --git a/src/field/pokemon.ts b/src/field/pokemon.ts
index 01b4929133d..918e7217ac0 100644
--- a/src/field/pokemon.ts
+++ b/src/field/pokemon.ts
@@ -931,7 +931,7 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
         ret *= 2;
       }
       if (this.scene.arena.getTagOnSide(ArenaTagType.GRASS_WATER_PLEDGE, side)) {
-        ret /= 4;
+        ret >>= 2;
       }
 
       if (this.getTag(BattlerTagType.SLOW_START)) {
diff --git a/src/test/moves/pledge_moves.test.ts b/src/test/moves/pledge_moves.test.ts
new file mode 100644
index 00000000000..e397a772721
--- /dev/null
+++ b/src/test/moves/pledge_moves.test.ts
@@ -0,0 +1,224 @@
+import { BattlerIndex } from "#app/battle";
+import { ArenaTagSide } from "#app/data/arena-tag";
+import { allMoves } from "#app/data/move";
+import { Type } from "#app/data/type";
+import { ArenaTagType } from "#app/enums/arena-tag-type";
+import { Stat } from "#app/enums/stat";
+import { toDmgValue } from "#app/utils";
+import { Abilities } from "#enums/abilities";
+import { Moves } from "#enums/moves";
+import { Species } from "#enums/species";
+import GameManager from "#test/utils/gameManager";
+import Phaser from "phaser";
+import { afterEach, beforeAll, beforeEach, describe, it, expect, vi } from "vitest";
+
+describe("Moves - Pledge Moves", () => {
+  let phaserGame: Phaser.Game;
+  let game: GameManager;
+
+  beforeAll(() => {
+    phaserGame = new Phaser.Game({
+      type: Phaser.HEADLESS
+    });
+  });
+
+  afterEach(() => {
+    game.phaseInterceptor.restoreOg();
+  });
+
+  beforeEach(() => {
+    game = new GameManager(phaserGame);
+    game.override
+      .battleType("double")
+      .startingLevel(100)
+      .moveset([Moves.FIRE_PLEDGE, Moves.GRASS_PLEDGE, Moves.WATER_PLEDGE, Moves.SPLASH])
+      .enemySpecies(Species.SNORLAX)
+      .enemyLevel(100)
+      .enemyAbility(Abilities.BALL_FETCH)
+      .enemyMoveset(Moves.SPLASH);
+  });
+
+  it(
+    "Fire Pledge - should be an 80-power Fire-type attack outside of combination",
+    async () => {
+      await game.classicMode.startBattle([Species.BLASTOISE, Species.CHARIZARD]);
+
+      const firePledge = allMoves[Moves.FIRE_PLEDGE];
+      vi.spyOn(firePledge, "calculateBattlePower");
+
+      const playerPokemon = game.scene.getPlayerField();
+      vi.spyOn(playerPokemon[0], "getMoveType");
+
+      game.move.select(Moves.FIRE_PLEDGE, 0, BattlerIndex.ENEMY);
+      game.move.select(Moves.SPLASH, 1);
+
+      await game.setTurnOrder([BattlerIndex.PLAYER, BattlerIndex.PLAYER_2, BattlerIndex.ENEMY, BattlerIndex.ENEMY_2]);
+      await game.phaseInterceptor.to("MoveEndPhase", false);
+
+      expect(firePledge.calculateBattlePower).toHaveLastReturnedWith(80);
+      expect(playerPokemon[0].getMoveType).toHaveLastReturnedWith(Type.FIRE);
+    }
+  );
+
+  it(
+    "Fire Pledge - should not combine with an ally using Fire Pledge",
+    async () => {
+      await game.classicMode.startBattle([Species.BLASTOISE, Species.CHARIZARD]);
+
+      const firePledge = allMoves[Moves.FIRE_PLEDGE];
+      vi.spyOn(firePledge, "calculateBattlePower");
+
+      const playerPokemon = game.scene.getPlayerField();
+      playerPokemon.forEach(p => vi.spyOn(p, "getMoveType"));
+
+      const enemyPokemon = game.scene.getEnemyField();
+
+      game.move.select(Moves.FIRE_PLEDGE, 0, BattlerIndex.ENEMY);
+      game.move.select(Moves.FIRE_PLEDGE, 0, BattlerIndex.ENEMY_2);
+
+      await game.setTurnOrder([BattlerIndex.PLAYER, BattlerIndex.PLAYER_2, BattlerIndex.ENEMY, BattlerIndex.ENEMY_2]);
+
+      await game.phaseInterceptor.to("MoveEndPhase");
+      expect(firePledge.calculateBattlePower).toHaveLastReturnedWith(80);
+      expect(playerPokemon[0].getMoveType).toHaveLastReturnedWith(Type.FIRE);
+
+      await game.phaseInterceptor.to("BerryPhase", false);
+      expect(firePledge.calculateBattlePower).toHaveLastReturnedWith(80);
+      expect(playerPokemon[1].getMoveType).toHaveLastReturnedWith(Type.FIRE);
+
+      enemyPokemon.forEach(p => expect(p.hp).toBeLessThan(p.getMaxHp()));
+    }
+  );
+
+  it(
+    "Fire Pledge - should not combine with an enemy's Pledge move",
+    async () => {
+      game.override
+        .battleType("single")
+        .enemyMoveset(Moves.GRASS_PLEDGE);
+
+      await game.classicMode.startBattle([Species.CHARIZARD]);
+
+      const playerPokemon = game.scene.getPlayerPokemon()!;
+      const enemyPokemon = game.scene.getEnemyPokemon()!;
+
+      game.move.select(Moves.FIRE_PLEDGE);
+
+      await game.toNextTurn();
+
+      // Neither Pokemon should defer their move's effects as they would
+      // if they combined moves, so both should be damaged.
+      expect(playerPokemon.hp).toBeLessThan(playerPokemon.getMaxHp());
+      expect(enemyPokemon.hp).toBeLessThan(enemyPokemon.getMaxHp());
+      expect(game.scene.arena.getTag(ArenaTagType.FIRE_GRASS_PLEDGE)).toBeUndefined();
+    }
+  );
+
+  it(
+    "Grass Pledge - should combine with Fire Pledge to form a 150-power Fire-type attack that creates a 'sea of fire'",
+    async () => {
+      await game.classicMode.startBattle([Species.CHARIZARD, Species.BLASTOISE]);
+
+      const grassPledge = allMoves[Moves.GRASS_PLEDGE];
+      vi.spyOn(grassPledge, "calculateBattlePower");
+
+      const playerPokemon = game.scene.getPlayerField();
+      const enemyPokemon = game.scene.getEnemyField();
+
+      vi.spyOn(playerPokemon[1], "getMoveType");
+      const baseDmgMock = vi.spyOn(enemyPokemon[0], "getBaseDamage");
+
+      game.move.select(Moves.FIRE_PLEDGE, 0, BattlerIndex.ENEMY_2);
+      game.move.select(Moves.GRASS_PLEDGE, 1, BattlerIndex.ENEMY);
+
+      await game.setTurnOrder([BattlerIndex.PLAYER, BattlerIndex.PLAYER_2, BattlerIndex.ENEMY, BattlerIndex.ENEMY_2]);
+      // advance to the end of PLAYER_2's move this turn
+      for (let i = 0; i < 2; i++) {
+        await game.phaseInterceptor.to("MoveEndPhase");
+      }
+      expect(playerPokemon[1].getMoveType).toHaveLastReturnedWith(Type.FIRE);
+      expect(grassPledge.calculateBattlePower).toHaveLastReturnedWith(150);
+
+      const baseDmg = baseDmgMock.mock.results[baseDmgMock.mock.results.length - 1].value;
+      expect(enemyPokemon[0].getMaxHp() - enemyPokemon[0].hp).toBe(toDmgValue(baseDmg * 1.5));
+      expect(enemyPokemon[1].hp).toBe(enemyPokemon[1].getMaxHp()); // PLAYER should not have attacked
+      expect(game.scene.arena.getTagOnSide(ArenaTagType.FIRE_GRASS_PLEDGE, ArenaTagSide.ENEMY)).toBeDefined();
+
+      const enemyStartingHp = enemyPokemon.map(p => p.hp);
+      await game.toNextTurn();
+      enemyPokemon.forEach((p, i) => expect(enemyStartingHp[i] - p.hp).toBe(toDmgValue(p.getMaxHp() / 8)));
+    }
+  );
+
+  it(
+    "Fire Pledge - should combine with Water Pledge to form a 150-power Water-type attack that creates a 'rainbow'",
+    async () => {
+      game.override.moveset([Moves.FIRE_PLEDGE, Moves.WATER_PLEDGE, Moves.FIERY_DANCE, Moves.SPLASH]);
+
+      await game.classicMode.startBattle([Species.BLASTOISE, Species.VENUSAUR]);
+
+      const firePledge = allMoves[Moves.FIRE_PLEDGE];
+      vi.spyOn(firePledge, "calculateBattlePower");
+
+      const playerPokemon = game.scene.getPlayerField();
+      const enemyPokemon = game.scene.getEnemyField();
+
+      vi.spyOn(playerPokemon[1], "getMoveType");
+
+      game.move.select(Moves.WATER_PLEDGE, 0, BattlerIndex.ENEMY_2);
+      game.move.select(Moves.FIRE_PLEDGE, 1, BattlerIndex.ENEMY);
+
+      await game.setTurnOrder([BattlerIndex.PLAYER, BattlerIndex.PLAYER_2, BattlerIndex.ENEMY, BattlerIndex.ENEMY_2]);
+      // advance to the end of PLAYER_2's move this turn
+      for (let i = 0; i < 2; i++) {
+        await game.phaseInterceptor.to("MoveEndPhase");
+      }
+      expect(playerPokemon[1].getMoveType).toHaveLastReturnedWith(Type.WATER);
+      expect(firePledge.calculateBattlePower).toHaveLastReturnedWith(150);
+      expect(enemyPokemon[1].hp).toBe(enemyPokemon[1].getMaxHp()); // PLAYER should not have attacked
+      expect(game.scene.arena.getTagOnSide(ArenaTagType.WATER_FIRE_PLEDGE, ArenaTagSide.PLAYER)).toBeDefined();
+
+      await game.toNextTurn();
+
+      game.move.select(Moves.FIERY_DANCE, 0, BattlerIndex.ENEMY_2);
+      game.move.select(Moves.SPLASH, 1);
+      await game.setTurnOrder([BattlerIndex.PLAYER, BattlerIndex.PLAYER_2, BattlerIndex.ENEMY, BattlerIndex.ENEMY_2]);
+      await game.phaseInterceptor.to("MoveEndPhase");
+
+      // Rainbow effect should increase Fiery Dance's chance of raising Sp. Atk to 100%
+      expect(playerPokemon[0].getStatStage(Stat.SPATK)).toBe(1);
+    }
+  );
+
+  it(
+    "Water Pledge - should combine with Grass Pledge to form a 150-power Grass-type attack that creates a 'swamp'",
+    async () => {
+      await game.classicMode.startBattle([Species.BLASTOISE, Species.CHARIZARD]);
+
+      const waterPledge = allMoves[Moves.WATER_PLEDGE];
+      vi.spyOn(waterPledge, "calculateBattlePower");
+
+      const playerPokemon = game.scene.getPlayerField();
+      const enemyPokemon = game.scene.getEnemyField();
+      const enemyStartingSpd = enemyPokemon.map(p => p.getEffectiveStat(Stat.SPD));
+
+      vi.spyOn(playerPokemon[1], "getMoveType");
+
+      game.move.select(Moves.GRASS_PLEDGE, 0, BattlerIndex.ENEMY_2);
+      game.move.select(Moves.WATER_PLEDGE, 1, BattlerIndex.ENEMY);
+
+      await game.setTurnOrder([BattlerIndex.PLAYER, BattlerIndex.PLAYER_2, BattlerIndex.ENEMY, BattlerIndex.ENEMY_2]);
+      // advance to the end of PLAYER_2's move this turn
+      for (let i = 0; i < 2; i++) {
+        await game.phaseInterceptor.to("MoveEndPhase");
+      }
+
+      expect(playerPokemon[1].getMoveType).toHaveLastReturnedWith(Type.GRASS);
+      expect(waterPledge.calculateBattlePower).toHaveLastReturnedWith(150);
+      expect(enemyPokemon[1].hp).toBe(enemyPokemon[1].getMaxHp());
+
+      expect(game.scene.arena.getTagOnSide(ArenaTagType.GRASS_WATER_PLEDGE, ArenaTagSide.ENEMY)).toBeDefined();
+      enemyPokemon.forEach((p, i) => expect(p.getEffectiveStat(Stat.SPD)).toBe(Math.floor(enemyStartingSpd[i] / 4)));
+    }
+  );
+});