Add min source gen for event-only Pokemon (smogon#10339)

sim/team-validator.ts

@@ -101,6 +101,10 @@ export class PokemonSources {
 	 * `null` = definitely not an event egg that can be used with the Pomeg glitch
 	 */
 	pomegEventEgg?: string | null;
+	/**
+	 * For event-only Pokemon that do not have a minimum source gen identified by its moves
+	 */
+	eventOnlyMinSourceGen?: number;
 	/**
 	 * Some Pokemon evolve by having a move in their learnset (like Piloswine
 	 * with Ancient Power). These can only carry three other moves from their
@@ -151,6 +155,7 @@ export class PokemonSources {
 		this.limitedEggMoves = null;
 	}
 	minSourceGen() {
+		if (this.eventOnlyMinSourceGen) return this.eventOnlyMinSourceGen;
 		if (this.sourcesBefore) return this.sourcesAfter || 1;
 		let min = 10;
 		for (const source of this.sources) {
@@ -877,6 +882,7 @@ export class TeamValidator {
 			let legal = false;
 			for (const event of eventData) {
 				if (this.validateEvent(set, setSources, event, eventSpecies)) continue;
+				setSources.eventOnlyMinSourceGen = event.generation;
 				legal = true;
 				break;
 			}

test/sim/team-validator/events.js

@@ -150,6 +150,18 @@ describe('Team Validator', function () {
 		assert.false.legalTeam(team, 'gen7anythinggoes');
 	});
 
+	it('should identify the minimum source gen of event-only Pokemon which haven\'t already been identified by its moves', function () {
+		let team = [
+			{species: 'jirachi', ability: 'serenegrace', shiny: true, moves: ['aurasphere'], evs: {hp: 1}, ivs: {hp: 31, atk: 0, def: 31, spa: 31, spd: 31, spe: 31}},
+		];
+		assert.legalTeam(team, 'gen9ou');
+
+		team = [
+			{species: 'jirachi', ability: 'serenegrace', shiny: true, moves: ['hiddenpowerfighting'], nature: 'serious', evs: {hp: 1}, ivs: {hp: 31, atk: 0, def: 31, spa: 31, spd: 31, spe: 31}},
+		];
+		assert.false.legalTeam(team, 'gen7ou');
+	});
+
 	it.skip('should allow evolved Pokemon obtainable from events at lower levels than they could otherwise be obtained', function () {
 		const team = [
 			{species: 'dragonite', ability: 'innerfocus', moves: ['dracometeor'], evs: {hp: 1}, level: 50},