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export const Scripts: ModdedBattleScriptsData = {
	gen: 9,
	field: {
		suppressingWeather() {
			for (const pokemon of this.battle.getAllActive()) {
				if (pokemon && !pokemon.fainted && !pokemon.ignoringAbility() &&
					(pokemon.getAbility().suppressWeather ||
						pokemon.m.innates?.some((k: string) => this.battle.dex.abilities.get(k).suppressWeather))) {
					return true;
				}
			}
			return false;
		},
	},
	pokemon: {
		ignoringAbility() {
			// Check if any active pokemon have the ability Neutralizing Gas
			let neutralizinggas = false;
			for (const pokemon of this.battle.getAllActive()) {
				// can't use hasAbility because it would lead to infinite recursion
				if (
					(pokemon.ability === ('neutralizinggas' as ID) || pokemon.m.innates?.some((k: string) => k === 'neutralizinggas')) &&
					!pokemon.volatiles['gastroacid'] && !pokemon.abilityState.ending
				) {
					neutralizinggas = true;
					break;
				}
			}

			return !!(
				(this.battle.gen >= 5 && !this.isActive) ||
				((this.volatiles['gastroacid'] ||
					(neutralizinggas && (this.ability !== ('neutralizinggas' as ID) ||
						this.m.innates?.some((k: string) => k === 'neutralizinggas'))
					)) && !this.getAbility().flags['cantsuppress']
				)
			);
		},
		hasAbility(ability) {
			if (this.ignoringAbility()) return false;
			if (Array.isArray(ability)) return ability.some(abil => this.hasAbility(abil));
			ability = this.battle.toID(ability);
			return this.ability === ability || !!this.volatiles['ability:' + ability];
		},
		transformInto(pokemon, effect) {
			const species = pokemon.species;
			if (pokemon.fainted || this.illusion || pokemon.illusion || (pokemon.volatiles['substitute'] && this.battle.gen >= 5) ||
				(pokemon.transformed && this.battle.gen >= 2) || (this.transformed && this.battle.gen >= 5) ||
				species.name === 'Eternatus-Eternamax') {
				return false;
			}

			if (!this.setSpecies(species, effect, true)) return false;

			this.transformed = true;
			this.weighthg = pokemon.weighthg;

			const types = pokemon.getTypes(true, true);
			this.setType(pokemon.volatiles['roost'] ? pokemon.volatiles['roost'].typeWas : types, true);
			this.addedType = pokemon.addedType;
			this.knownType = this.isAlly(pokemon) && pokemon.knownType;
			this.apparentType = pokemon.apparentType;

			let statName: StatIDExceptHP;
			for (statName in this.storedStats) {
				this.storedStats[statName] = pokemon.storedStats[statName];
				if (this.modifiedStats) this.modifiedStats[statName] = pokemon.modifiedStats![statName]; // Gen 1: Copy modified stats.
			}
			this.moveSlots = [];
			this.set.ivs = (this.battle.gen >= 5 ? this.set.ivs : pokemon.set.ivs);
			this.hpType = (this.battle.gen >= 5 ? this.hpType : pokemon.hpType);
			this.hpPower = (this.battle.gen >= 5 ? this.hpPower : pokemon.hpPower);
			this.timesAttacked = pokemon.timesAttacked;
			for (const moveSlot of pokemon.moveSlots) {
				let moveName = moveSlot.move;
				if (moveSlot.id === 'hiddenpower') {
					moveName = 'Hidden Power ' + this.hpType;
				}
				this.moveSlots.push({
					move: moveName,
					id: moveSlot.id,
					pp: moveSlot.maxpp === 1 ? 1 : 5,
					maxpp: this.battle.gen >= 5 ? (moveSlot.maxpp === 1 ? 1 : 5) : moveSlot.maxpp,
					target: moveSlot.target,
					disabled: false,
					used: false,
					virtual: true,
				});
			}
			let boostName: BoostID;
			for (boostName in pokemon.boosts) {
				this.boosts[boostName] = pokemon.boosts[boostName];
			}
			if (this.battle.gen >= 6) {
				// we need to remove all crit volatiles before adding any crit volatiles
				const volatilesToCopy = ['dragoncheer', 'focusenergy', 'gmaxchistrike', 'laserfocus'];
				for (const volatile of volatilesToCopy) this.removeVolatile(volatile);
				for (const volatile of volatilesToCopy) {
					if (pokemon.volatiles[volatile]) {
						this.addVolatile(volatile);
						if (volatile === 'gmaxchistrike') this.volatiles[volatile].layers = pokemon.volatiles[volatile].layers;
						if (volatile === 'dragoncheer') this.volatiles[volatile].hasDragonType = pokemon.volatiles[volatile].hasDragonType;
					}
				}
			}
			if (effect) {
				this.battle.add('-transform', this, pokemon, '[from] ' + effect.fullname);
			} else {
				this.battle.add('-transform', this, pokemon);
			}
			if (this.terastallized && this.terastallized !== this.apparentType) {
				this.battle.add('-start', this, 'typechange', this.terastallized, '[silent]');
				this.apparentType = this.terastallized;
			}
			if (this.battle.gen > 2) {
				this.setAbility(pokemon.ability, this, true);
				if (this.m.innates) {
					for (const innate of this.m.innates) {
						this.removeVolatile('ability:' + innate);
					}
				}
				if (pokemon.m.innates) {
					for (const innate of pokemon.m.innates) {
						this.addVolatile('ability:' + innate, this);
					}
				}
			}

			// Change formes based on held items (for Transform)
			// Only ever relevant in Generation 4 since Generation 3 didn't have item-based forme changes
			if (this.battle.gen === 4) {
				if (this.species.num === 487) {
					// Giratina formes
					if (this.species.name === 'Giratina' && this.item === 'griseousorb') {
						this.formeChange('Giratina-Origin');
					} else if (this.species.name === 'Giratina-Origin' && this.item !== 'griseousorb') {
						this.formeChange('Giratina');
					}
				}
				if (this.species.num === 493) {
					// Arceus formes
					const item = this.getItem();
					const targetForme = (item?.onPlate ? 'Arceus-' + item.onPlate : 'Arceus');
					if (this.species.name !== targetForme) {
						this.formeChange(targetForme);
					}
				}
			}

			return true;
		},
		/**
		 * Changes this Pokemon's forme to match the given speciesId (or species).
		 * This function handles all changes to stats, ability, type, species, etc.
		 * as well as sending all relevant messages sent to the client.
		 */
		formeChange(speciesId, source, isPermanent, message) {
			if (!source) source = this.battle.effect;

			const rawSpecies = this.battle.dex.species.get(speciesId);

			const species = this.setSpecies(rawSpecies, source);
			if (!species) return false;

			if (this.battle.gen <= 2) return true;

			// The species the opponent sees
			const apparentSpecies =
				this.illusion ? this.illusion.species.name : species.baseSpecies;
			if (isPermanent) {
				this.baseSpecies = rawSpecies;
				this.details = this.getUpdatedDetails();
				this.battle.add('detailschange', this, (this.illusion || this).details);
				if (source.effectType === 'Item') {
					this.canTerastallize = null; // National Dex behavior
					if (source.zMove) {
						this.battle.add('-burst', this, apparentSpecies, species.requiredItem);
						this.moveThisTurnResult = true; // Ultra Burst counts as an action for Truant
					} else if (source.isPrimalOrb) {
						if (this.illusion) {
							this.ability = '';
							this.battle.add('-primal', this.illusion);
						} else {
							this.battle.add('-primal', this);
						}
					} else {
						this.battle.add('-mega', this, apparentSpecies, species.requiredItem);
						this.moveThisTurnResult = true; // Mega Evolution counts as an action for Truant
					}
				} else if (source.effectType === 'Status') {
					// Shaymin-Sky -> Shaymin
					this.battle.add('-formechange', this, species.name, message);
				}
			} else {
				if (source.effectType === 'Ability') {
					this.battle.add('-formechange', this, species.name, message, `[from] ability: ${source.name}`);
				} else {
					this.battle.add('-formechange', this, this.illusion ? this.illusion.species.name : species.name, message);
				}
			}
			if (isPermanent && !['disguise', 'iceface', 'ability:disguise', 'ability:iceface'].includes(source.id)) {
				if (this.illusion) {
					this.ability = ''; // Don't allow Illusion to wear off
				}
				this.setAbility(species.abilities['0'], null, true);
				this.baseAbility = this.ability;
			}
			if (this.terastallized && this.terastallized !== this.apparentType) {
				this.battle.add('-start', this, 'typechange', this.terastallized, '[silent]');
				this.apparentType = this.terastallized;
			}
			return true;
		},
	},
};