diff --git a/data/rulesets.ts b/data/rulesets.ts
index 7fe0954628..ddc298ee52 100644
--- a/data/rulesets.ts
+++ b/data/rulesets.ts
@@ -1798,7 +1798,7 @@ export const Rulesets: import('../sim/dex-formats').FormatDataTable = {
 	allowtradeback: {
 		effectType: 'ValidatorRule',
 		name: 'Allow Tradeback',
-		desc: "Allows Gen 1 pokemon to have moves from their Gen 2 learnsets",
+		desc: "Allows moves and abilities only obtainable by trading from future generations.",
 		// Implemented in team-validator.js
 	},
 	lgpenormalrules: {
diff --git a/sim/team-validator.ts b/sim/team-validator.ts
index 02cea0039b..5f7af374d5 100644
--- a/sim/team-validator.ts
+++ b/sim/team-validator.ts
@@ -335,6 +335,7 @@ export class TeamValidator {
 	readonly gen: number;
 	readonly ruleTable: RuleTable;
 	readonly minSourceGen: number;
+	readonly maxSourceGen: number;
 
 	readonly toID: (str: any) => ID;
 	constructor(format: string | Format, dex = Dex) {
@@ -348,6 +349,13 @@ export class TeamValidator {
 
 		this.minSourceGen = this.ruleTable.minSourceGen;
 
+		let maxSourceGen = this.dex.gen;
+		if (this.ruleTable.has('allowtradeback')) {
+			if (this.dex.gen === 1) maxSourceGen = 2;
+			else if (this.dex.gen === 8) maxSourceGen = 9;
+		}
+		this.maxSourceGen = maxSourceGen;
+
 		this.toID = toID;
 	}
 
@@ -835,7 +843,7 @@ export class TeamValidator {
 
 		const learnsetSpecies = dex.species.getLearnsetData(outOfBattleSpecies.id);
 		let isFromRBYEncounter = false;
-		if (this.gen === 1 && ruleTable.has('obtainablemisc') && !this.ruleTable.has('allowtradeback')) {
+		if (this.gen === 1 && ruleTable.has('obtainablemisc') && this.maxSourceGen === 1) {
 			let lowestEncounterLevel;
 			for (const encounter of learnsetSpecies.encounters || []) {
 				if (encounter.generation !== 1) continue;
@@ -2103,7 +2111,6 @@ export class TeamValidator {
 		const dex = this.dex;
 		let name = set.species;
 		const species = dex.species.get(set.species);
-		const maxSourceGen = this.ruleTable.has('allowtradeback') ? Utils.clampIntRange(dex.gen + 1, 1, 8) : dex.gen;
 		if (!eventSpecies) eventSpecies = species;
 		if (set.name && set.species !== set.name && species.baseSpecies !== set.name) name = `${set.name} (${set.species})`;
 
@@ -2117,7 +2124,7 @@ export class TeamValidator {
 			if (fastReturn) return true;
 			problems.push(`This format requires Pokemon from gen ${this.minSourceGen} or later and ${name} is from gen ${eventData.generation}${etc}.`);
 		}
-		if (maxSourceGen < eventData.generation) {
+		if (this.maxSourceGen < eventData.generation) {
 			if (fastReturn) return true;
 			problems.push(`This format is in gen ${dex.gen} and ${name} is from gen ${eventData.generation}${etc}.`);
 		}
@@ -2261,7 +2268,10 @@ export class TeamValidator {
 			}
 			if (species.abilities['H']) {
 				const isHidden = (set.ability === species.abilities['H']);
-				if (!isHidden && eventData.isHidden && dex.gen <= 8) {
+				const canUseAbilityPatchReverse = dex.gen >= 9 || (
+					dex.gen === 8 && this.maxSourceGen >= 9 && !Dex.mod('gen9').species.get(species.name).isNonstandard
+				);
+				if (!isHidden && eventData.isHidden && !canUseAbilityPatchReverse) {
 					if (fastReturn) return true;
 					problems.push(`${name} must have its Hidden Ability${etc}.`);
 				}
@@ -2281,8 +2291,7 @@ export class TeamValidator {
 		let minSourceGen = this.minSourceGen;
 		if (this.dex.gen >= 3 && minSourceGen < 3) minSourceGen = 3;
 		if (species) minSourceGen = Math.max(minSourceGen, species.gen);
-		const maxSourceGen = this.ruleTable.has('allowtradeback') ? Utils.clampIntRange(this.dex.gen + 1, 1, 8) : this.dex.gen;
-		return new PokemonSources(maxSourceGen, minSourceGen);
+		return new PokemonSources(this.maxSourceGen, minSourceGen);
 	}
 
 	validateMoves(
@@ -2547,11 +2556,6 @@ export class TeamValidator {
 		// set of possible sources of a pokemon with this move
 		const moveSources = new PokemonSources();
 
-		/**
-		 * The format doesn't allow Pokemon traded from the future
-		 * (This is everything except in Gen 1 Tradeback)
-		 */
-		const noFutureGen = !ruleTable.has('allowtradeback');
 		/**
 		 * The format allows Sketch to copy moves in Gen 8
 		 */
@@ -2629,7 +2633,7 @@ export class TeamValidator {
 					}
 					continue;
 				}
-				if (noFutureGen && learnedGen > dex.gen) {
+				if (learnedGen > this.maxSourceGen) {
 					if (!cantLearnReason) {
 						cantLearnReason = `can't be transferred from Gen ${learnedGen} to ${dex.gen}.`;
 					}
diff --git a/test/sim/team-validator/basic.js b/test/sim/team-validator/basic.js
index d0926240a7..4fd1005abf 100644
--- a/test/sim/team-validator/basic.js
+++ b/test/sim/team-validator/basic.js
@@ -244,6 +244,20 @@ describe('Team Validator', () => {
 		assert.legalTeam(team, 'gen8ou');
 	});
 
+	// https://www.smogon.com/forums/threads/tradebacks-in-gen-8-metagames.3735419/
+	it('should allow VC moves with non-Hidden abilities in Gen 8 Tradebacks', () => {
+		// Machamp doesn't exist in Gen 9
+		let team = [
+			{ species: 'machamp', ability: 'noguard', moves: ['fissure'], evs: { hp: 1 } },
+		];
+		assert.false.legalTeam(team, 'gen8anythinggoes@@@allowtradeback');
+		team = [
+			{ species: 'clefable', ability: 'magicguard', moves: ['wish', 'teleport', 'knockoff'], evs: { hp: 1 } },
+		];
+		assert.false.legalTeam(team, 'gen8anythinggoes');
+		assert.legalTeam(team, 'gen8anythinggoes@@@allowtradeback');
+	});
+
 	it(`should disallow past gen only moves in Gen 9`, () => {
 		const team = [
 			{ species: 'oricorio', ability: 'dancer', moves: ['roleplay'], evs: { hp: 1 } },