diff --git a/build-tools/build-indexes b/build-tools/build-indexes
index 48babbe43..4cd43a59f 100755
--- a/build-tools/build-indexes
+++ b/build-tools/build-indexes
@@ -430,13 +430,41 @@ process.stdout.write("Building `data/teambuilder-tables.js`... ");
 			if (!tierTable[speciesTier]) tierTable[speciesTier] = [];
 			tierTable[speciesTier].push(id);
 
-			if (genNum === 9) {
+			if (genNum >= 6) {
 				for (const meta of [
-					'ubersuu', 'almostanyability', 'balancedhackmons', 'godlygift', 'mixandmega', 'sharedpower', 'stabmons',
+					'1v1', '2v2doubles', 'lcuu', 'freeforall', 'ubersuu', 'almostanyability', 'balancedhackmons', 'godlygift', 'mixandmega', 'sharedpower', 'stabmons',
+					'12switch', '350cup', 'alphabetcup', 'badnboosted', 'battlefields', 'biomechmons', 'camomons', 'categoryswap',
+					'convergence', 'crossevolution', 'fervetimpersonation', 'foresighters', 'formemons', 'fortemons', 'franticfusions',
+					'fullpotential', 'inheritance', 'inverse', 'natureswap', 'partnersincrime', 'passiveaggressive', 'pokebilities',
+					'pokemoves', 'relayrace', 'revelationmons', 'sharingiscaring', 'teradonation', 'teraoverride', 'thecardgame',
+					'thelosersgame', 'trademarked', 'triples', 'typesplit', 'voltturnmayhem', 'nationaldexubersuu', 'nationaldex1v1',
+					'nationaldexaaa', 'nationaldexbh', 'nationaldexgodlygift', 'nationaldexstabmons', 'tiershift',
 				]) {
 					const format = Dex.formats.get(gen + meta);
 					if (format.exists && Dex.formats.getRuleTable(format).isBannedSpecies(species)) {
 						if (!metagameBans[meta]) metagameBans[meta] = {};
+						if (Dex.formats.getRuleTable(format).has('megarayquazaclause')) {
+							metagameBans[meta]['megarayquazaclause'] = 1;
+						}
+						if (species.requiredItems && species.requiredItems.length) {
+							for (const itemName of species.requiredItems) {
+								const item = Dex.items.get(itemName);
+								if (item.itemUser && item.itemUser.includes(species.name) &&
+									Dex.formats.getRuleTable(format).isBanned('item:' + item.id)) {
+									metagameBans[meta][species.id] = 1;
+								}
+								if (item.megaStone && Object.values(item.megaStone).includes(species.name) &&
+									Dex.formats.getRuleTable(format).isBanned('item:' + item.id)) {
+									metagameBans[meta][species.id] = 1;
+								}
+							}
+						}
+						if (species.requiredAbility) {
+							const ability = Dex.items.get(species.requiredAbility);
+							if (Dex.formats.getRuleTable(format).isBanned('ability:' + ability.id)) {
+								metagameBans[meta][species.id] = 1;
+							}
+						}
 						metagameBans[meta][species.id] = 1;
 					}
 				}
@@ -507,6 +535,7 @@ process.stdout.write("Building `data/teambuilder-tables.js`... ");
 			BattleTeambuilderTable[gen + 'lc'] = {};
 			BattleTeambuilderTable[gen + 'lc'].tiers = tiers;
 			BattleTeambuilderTable[gen + 'lc'].overrideTier = overrideTier;
+			BattleTeambuilderTable[gen + 'lc'].metagameBans = metagameBans;
 			BattleTeambuilderTable[gen + 'lc'].formatSlices = formatSlices;
 		} else if (isLetsGo) {
 			BattleTeambuilderTable['gen7letsgo'] = {};
@@ -531,6 +560,7 @@ process.stdout.write("Building `data/teambuilder-tables.js`... ");
 			BattleTeambuilderTable[gen + 'doubles'].tiers = tiers;
 			BattleTeambuilderTable[gen + 'doubles'].items = items;
 			BattleTeambuilderTable[gen + 'doubles'].overrideTier = overrideTier;
+			BattleTeambuilderTable[gen + 'doubles'].metagameBans = metagameBans;
 			BattleTeambuilderTable[gen + 'doubles'].formatSlices = formatSlices;
 		} else if (isGen9BH) {
 			BattleTeambuilderTable['bh'] = {};
diff --git a/play.pokemonshowdown.com/src/battle-dex-search.ts b/play.pokemonshowdown.com/src/battle-dex-search.ts
index 2475e1398..a9d89e193 100644
--- a/play.pokemonshowdown.com/src/battle-dex-search.ts
+++ b/play.pokemonshowdown.com/src/battle-dex-search.ts
@@ -698,7 +698,6 @@ abstract class BattleTypedSearch<T extends SearchType> {
 		}
 		if ((format.endsWith('lc') || format.startsWith('lc')) && format !== 'caplc' && !this.formatType) {
 			this.formatType = 'lc';
-			format = 'lc' as ID;
 		}
 		if (format.endsWith('draft')) {
 			format = format.slice(0, -5) as ID;
@@ -1156,17 +1155,39 @@ class BattlePokemonSearch extends BattleTypedSearch<'pokemon'> {
 			];
 		}
 		const customBanlists = [
-			'ubersuu', 'almostanyability', 'balancedhackmons', 'godlygift', 'mixandmega', 'sharedpower', 'stabmons',
+			'1v1', '2v2doubles', 'lcuu', 'freeforall', 'ubersuu', 'almostanyability', 'balancedhackmons', 'godlygift', 'mixandmega',
+			'sharedpower', 'stabmons', '12switch', '350cup', 'alphabetcup', 'badnboosted', 'battlefields', 'biomechmons', 'camomons',
+			'categoryswap', 'convergence', 'crossevolution', 'fervetimpersonation', 'foresighters', 'formemons', 'fortemons',
+			'franticfusions', 'fullpotential', 'inheritance', 'inverse', 'natureswap', 'partnersincrime', 'passiveaggressive',
+			'pokebilities', 'pokemoves', 'relayrace', 'revelationmons', 'sharingiscaring', 'teradonation', 'teraoverride', 'thecardgame',
+			'thelosersgame', 'trademarked', 'triples', 'typesplit', 'voltturnmayhem', 'nationaldexubersuu', 'nationaldex1v1',
+			'nationaldexaaa', 'nationaldexbh', 'nationaldexgodlygift', 'nationaldexstabmons', 'tiershift',
 		];
-		if (customBanlists.includes(format) && table.metagameBans?.[format]) {
-			tierSet = tierSet.filter(([type, id]) => {
-				if (id in table.metagameBans[format]) return false;
-				if ('miraidon' in table.metagameBans[format] && 'calyrexshadow' in table.metagameBans[format] &&
-					type === 'header' && id === 'AG') return false;
-				return true;
-			});
-		}
-		if (dex.gen >= 8) {
+		if (dex.gen >= 6) {
+			if (
+				(customBanlists.includes(format) && table.metagameBans?.[format]) ||
+				(this.formatType === 'natdex' && customBanlists.includes('nationaldex' + format) &&
+					table.metagameBans?.['nationaldex' + format])) {
+				tierSet = tierSet.filter(([type, id]) => {
+					if (id in table.metagameBans[format]) return false;
+					if (this.formatType === 'natdex' && id in table.metagameBans['nationaldex' + format]) return false;
+					if (!this.formatType && dex.gen === 9 &&
+						'miraidon' in table.metagameBans[format] &&
+						'calyrexshadow' in table.metagameBans[format] &&
+						type === 'header' && id === 'AG'
+					) return false;
+					if (!this.formatType && dex.gen === 8 &&
+						'zacian' in table.metagameBans[format] &&
+						'zaciancrowned' in table.metagameBans[format] &&
+						type === 'header' && id === 'AG'
+					) return false;
+					if ((dex.gen === 7 || dex.gen === 6) &&
+						(id === 'AG' || id === 'rayquazamega') &&
+						'megarayquazaclause' in table.metagameBans[format]
+					) return false;
+					return true;
+				});
+			}
 			if ((format === 'doubles' || format === 'monotype') && this.formatType === 'natdex' && table.metagameBans?.[format]) {
 				tierSet = tierSet.filter(([type, id]) => {
 					if (id in table.metagameBans[format]) return false;