diff --git a/data/abilities.ts b/data/abilities.ts
index b8c631f1ff..475dd63b43 100644
--- a/data/abilities.ts
+++ b/data/abilities.ts
@@ -276,7 +276,7 @@ export const Abilities: {[abilityid: string]: AbilityData} = {
 			if (effect?.effectType !== 'Move') {
 				return;
 			}
-			if (source.species.id === 'greninja' && source.hp && !source.transformed && source.side.foe.pokemonLeft) {
+			if (source.species.id === 'greninja' && source.hp && !source.transformed && source.side.foePokemonLeft()) {
 				this.add('-activate', source, 'ability: Battle Bond');
 				source.formeChange('Greninja-Ash', this.effect, true);
 			}
@@ -3154,19 +3154,14 @@ export const Abilities: {[abilityid: string]: AbilityData} = {
 		onStart(pokemon) {
 			let activated = false;
 			for (const sideCondition of ['reflect', 'lightscreen', 'auroraveil']) {
-				if (pokemon.side.getSideCondition(sideCondition)) {
-					if (!activated) {
-						this.add('-activate', pokemon, 'ability: Screen Cleaner');
-						activated = true;
+				for (const side of [pokemon.side, ...pokemon.side.foeSidesWithConditions()]) {
+					if (side.getSideCondition(sideCondition)) {
+						if (!activated) {
+							this.add('-activate', pokemon, 'ability: Screen Cleaner');
+							activated = true;
+						}
+						side.removeSideCondition(sideCondition);
 					}
-					pokemon.side.removeSideCondition(sideCondition);
-				}
-				if (pokemon.side.foe.getSideCondition(sideCondition)) {
-					if (!activated) {
-						this.add('-activate', pokemon, 'ability: Screen Cleaner');
-						activated = true;
-					}
-					pokemon.side.foe.removeSideCondition(sideCondition);
 				}
 			}
 		},
diff --git a/data/mods/gen3/abilities.ts b/data/mods/gen3/abilities.ts
index 543d10fcbc..7ab80c99a3 100644
--- a/data/mods/gen3/abilities.ts
+++ b/data/mods/gen3/abilities.ts
@@ -152,7 +152,7 @@ export const Abilities: {[k: string]: ModdedAbilityData} = {
 		inherit: true,
 		onUpdate(pokemon) {
 			if (!pokemon.isStarted) return;
-			const target = pokemon.side.foe.randomAlly();
+			const target = pokemon.side.randomFoe();
 			if (!target || target.fainted) return;
 			const ability = target.getAbility();
 			const bannedAbilities = ['forecast', 'multitype', 'trace'];
diff --git a/data/mods/gen4/abilities.ts b/data/mods/gen4/abilities.ts
index b817dea0f1..1d09ed31ad 100644
--- a/data/mods/gen4/abilities.ts
+++ b/data/mods/gen4/abilities.ts
@@ -454,7 +454,7 @@ export const Abilities: {[k: string]: ModdedAbilityData} = {
 		inherit: true,
 		onUpdate(pokemon) {
 			if (!pokemon.isStarted) return;
-			const target = pokemon.side.foe.randomAlly();
+			const target = pokemon.side.randomFoe();
 			if (!target || target.fainted) return;
 			const ability = target.getAbility();
 			const bannedAbilities = ['forecast', 'multitype', 'trace'];
diff --git a/data/mods/gen5/abilities.ts b/data/mods/gen5/abilities.ts
index b642b2bba4..1185ec6133 100644
--- a/data/mods/gen5/abilities.ts
+++ b/data/mods/gen5/abilities.ts
@@ -19,7 +19,7 @@ export const Abilities: {[k: string]: ModdedAbilityData} = {
 	frisk: {
 		inherit: true,
 		onStart(pokemon) {
-			const target = pokemon.side.foe.randomAlly();
+			const target = pokemon.side.randomFoe();
 			if (target?.item) {
 				this.add('-item', target, target.getItem().name, '[from] ability: Frisk', '[of] ' + pokemon);
 			}
diff --git a/data/moves.ts b/data/moves.ts
index 5ebe97f618..b92a4a0588 100644
--- a/data/moves.ts
+++ b/data/moves.ts
@@ -4877,20 +4877,16 @@ export const Moves: {[moveid: string]: MoveData} = {
 				this.add('-sidestart', targetSide, 'Fire Pledge');
 			},
 			onEnd(targetSide) {
-				for (const pokemon of targetSide.activeTeam()) {
-					if (pokemon && !pokemon.hasType('Fire')) {
-						this.damage(pokemon.baseMaxhp / 8, pokemon);
-					}
+				for (const pokemon of targetSide.allies()) {
+					if (!pokemon.hasType('Fire')) this.damage(pokemon.baseMaxhp / 8, pokemon);
 				}
 				this.add('-sideend', targetSide, 'Fire Pledge');
 			},
 			onResidualOrder: 5,
 			onResidualSubOrder: 1,
 			onResidual(side) {
-				for (const pokemon of side.activeTeam()) {
-					if (pokemon && !pokemon.hasType('Fire')) {
-						this.damage(pokemon.baseMaxhp / 8, pokemon);
-					}
+				for (const pokemon of side.allies()) {
+					if (!pokemon.hasType('Fire')) this.damage(pokemon.baseMaxhp / 8, pokemon);
 				}
 			},
 		},
@@ -5944,15 +5940,10 @@ export const Moves: {[moveid: string]: MoveData} = {
 		priority: 0,
 		flags: {snatch: 1, authentic: 1},
 		onHitSide(side, source, move) {
-			const targets = [];
-			for (const pokemon of side.activeTeam()) {
-				if (
-					pokemon.hasAbility(['plus', 'minus']) &&
-					(!pokemon.volatiles['maxguard'] || this.runEvent('TryHit', pokemon, source, move))
-				) {
-					targets.push(pokemon);
-				}
-			}
+			const targets = side.allies().filter(target => (
+				target.hasAbility(['plus', 'minus']) &&
+				(!target.volatiles['maxguard'] || this.runEvent('TryHit', target, source, move))
+			));
 			if (!targets.length) return false;
 			let didSomething = false;
 			for (const target of targets) {
@@ -6187,13 +6178,13 @@ export const Moves: {[moveid: string]: MoveData} = {
 			onResidualOrder: 5,
 			onResidualSubOrder: 1.1,
 			onResidual(targetSide) {
-				for (const pokemon of targetSide.activeTeam()) {
-					if (!pokemon.hasType('Water')) this.damage(pokemon.baseMaxhp / 6, pokemon);
+				for (const target of targetSide.allies()) {
+					if (!target.hasType('Water')) this.damage(target.baseMaxhp / 6, target);
 				}
 			},
 			onEnd(targetSide) {
-				for (const pokemon of targetSide.activeTeam()) {
-					if (!pokemon.hasType('Water')) this.damage(pokemon.baseMaxhp / 6, pokemon);
+				for (const target of targetSide.allies()) {
+					if (!target.hasType('Water')) this.damage(target.baseMaxhp / 6, target);
 				}
 				this.add('-sideend', targetSide, 'G-Max Cannonade');
 			},
@@ -6839,13 +6830,13 @@ export const Moves: {[moveid: string]: MoveData} = {
 			onResidualOrder: 5,
 			onResidualSubOrder: 1.1,
 			onResidual(targetSide) {
-				for (const pokemon of targetSide.activeTeam()) {
-					if (!pokemon.hasType('Grass')) this.damage(pokemon.baseMaxhp / 6, pokemon);
+				for (const target of targetSide.allies()) {
+					if (!target.hasType('Grass')) this.damage(target.baseMaxhp / 6, target);
 				}
 			},
 			onEnd(targetSide) {
-				for (const pokemon of targetSide.activeTeam()) {
-					if (!pokemon.hasType('Grass')) this.damage(pokemon.baseMaxhp / 6, pokemon);
+				for (const target of targetSide.allies()) {
+					if (!target.hasType('Grass')) this.damage(target.baseMaxhp / 6, target);
 				}
 				this.add('-sideend', targetSide, 'G-Max Vine Lash');
 			},
@@ -6879,13 +6870,13 @@ export const Moves: {[moveid: string]: MoveData} = {
 			onResidualOrder: 5,
 			onResidualSubOrder: 1.1,
 			onResidual(targetSide) {
-				for (const pokemon of targetSide.activeTeam()) {
-					if (!pokemon.hasType('Rock')) this.damage(pokemon.baseMaxhp / 6, pokemon);
+				for (const target of targetSide.allies()) {
+					if (!target.hasType('Rock')) this.damage(target.baseMaxhp / 6, target);
 				}
 			},
 			onEnd(targetSide) {
-				for (const pokemon of targetSide.activeTeam()) {
-					if (!pokemon.hasType('Rock')) this.damage(pokemon.baseMaxhp / 6, pokemon);
+				for (const target of targetSide.allies()) {
+					if (!target.hasType('Rock')) this.damage(target.baseMaxhp / 6, target);
 				}
 				this.add('-sideend', targetSide, 'G-Max Volcalith');
 			},
@@ -6942,13 +6933,13 @@ export const Moves: {[moveid: string]: MoveData} = {
 			onResidualOrder: 5,
 			onResidualSubOrder: 1.1,
 			onResidual(targetSide) {
-				for (const pokemon of targetSide.activeTeam()) {
-					if (!pokemon.hasType('Fire')) this.damage(pokemon.baseMaxhp / 6, pokemon);
+				for (const target of targetSide.allies()) {
+					if (!target.hasType('Fire')) this.damage(target.baseMaxhp / 6, target);
 				}
 			},
 			onEnd(targetSide) {
-				for (const pokemon of targetSide.activeTeam()) {
-					if (!pokemon.hasType('Fire')) this.damage(pokemon.baseMaxhp / 6, pokemon);
+				for (const target of targetSide.allies()) {
+					if (!target.hasType('Fire')) this.damage(target.baseMaxhp / 6, target);
 				}
 				this.add('-sideend', targetSide, 'G-Max Wildfire');
 			},
@@ -10106,16 +10097,12 @@ export const Moves: {[moveid: string]: MoveData} = {
 		priority: 0,
 		flags: {snatch: 1, distance: 1, authentic: 1},
 		onHitSide(side, source, move) {
-			const targets = [];
-			for (const pokemon of side.activeTeam()) {
-				if (
-					pokemon.hasAbility(['plus', 'minus']) &&
-					(!pokemon.volatiles['maxguard'] || this.runEvent('TryHit', pokemon, source, move))
-				) {
-					targets.push(pokemon);
-				}
-			}
+			const targets = side.allies().filter(ally => (
+				ally.hasAbility(['plus', 'minus']) &&
+				(!ally.volatiles['maxguard'] || this.runEvent('TryHit', ally, source, move))
+			));
 			if (!targets.length) return false;
+
 			let didSomething = false;
 			for (const target of targets) {
 				didSomething = this.boost({def: 1, spd: 1}, target, source, move, false, true) || didSomething;
diff --git a/sim/battle.ts b/sim/battle.ts
index 56389e37d6..ee75f5b3b3 100644
--- a/sim/battle.ts
+++ b/sim/battle.ts
@@ -1414,7 +1414,7 @@ export class Battle {
 
 		if (this.maybeTriggerEndlessBattleClause(trappedBySide, stalenessBySide)) return;
 
-		if (this.gameType === 'triples' && !this.sides.filter(side => side.pokemonLeft > 1).length) {
+		if (this.gameType === 'triples' && this.sides.every(side => side.pokemonLeft === 1)) {
 			// If both sides have one Pokemon left in triples and they are not adjacent, they are both moved to the center.
 			const actives = this.getAllActive();
 			if (actives.length > 1 && !actives[0].isAdjacent(actives[1])) {
@@ -1594,7 +1594,7 @@ export class Battle {
 		}
 		if (!target?.hp) return 0;
 		if (!target.isActive) return false;
-		if (this.gen > 5 && !target.side.foe.pokemonLeft) return false;
+		if (this.gen > 5 && !target.side.foePokemonLeft()) return false;
 		boost = this.runEvent('Boost', target, source, effect, {...boost});
 		let success = null;
 		let boosted = isSecondary;
@@ -2062,7 +2062,7 @@ export class Battle {
 				return foeActives[frontPosition];
 			}
 		}
-		return pokemon.side.foe.randomAlly() || pokemon.side.foe.active[0];
+		return pokemon.side.randomFoe() || pokemon.side.foe.active[0];
 	}
 
 	checkFainted() {
diff --git a/sim/side.ts b/sim/side.ts
index fc990cd2eb..7d3f74d30d 100644
--- a/sim/side.ts
+++ b/sim/side.ts
@@ -204,12 +204,27 @@ export class Side {
 		return data;
 	}
 
-	randomAlly() {
-		const actives = this.allies();
+	randomFoe() {
+		const actives = this.foes();
 		if (!actives.length) return null;
 		return this.battle.sample(actives);
 	}
 
+	/** Intended as a way to iterate through all foe side conditions - do not use for anything else. */
+	foeSidesWithConditions() {
+		if (this.battle.gameType === 'multi') return this.battle.sides.filter(side => side !== this);
+
+		return [this.foe];
+	}
+	foePokemonLeft() {
+		if (this.battle.gameType === 'multi') {
+			return this.battle.sides.filter(side => side !== this).map(side => side.pokemonLeft).reduce((a, b) => a + b);
+		}
+
+		if (this.foe.allySide) return this.foe.pokemonLeft + this.foe.allySide.pokemonLeft;
+
+		return this.foe.pokemonLeft;
+	}
 	allies() {
 		// called during the first switch-in, so `active` can still contain nulls at this point
 		return this.activeTeam().filter(ally => ally && !ally.fainted);
@@ -217,7 +232,7 @@ export class Side {
 	foes() {
 		if (this.battle.gameType === 'free-for-all') {
 			return this.battle.sides.map(side => side.active[0])
-				.filter(pokemon => pokemon.side !== this && pokemon && !pokemon.fainted);
+				.filter(pokemon => pokemon && pokemon.side !== this && !pokemon.fainted);
 		}
 		return this.foe.allies();
 	}