From 737a8095ac27ad1d377b9fa4788d4762a94869c6 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Andr=C3=A9=20Bastos=20Dias?=
 <80102738+andrebastosdias@users.noreply.github.com>
Date: Sun, 8 Feb 2026 17:24:39 +0000
Subject: [PATCH] Add Full Arceus Clause (#11725)

* Enable Arceus EV Limit Mod

* English

* Add comment with implementation location

* Add Full Arceus Clause

* Add event for clause

* Move comment

* Lint

* Simplify assignments

* Revert Melmetal changes

* Revert "Revert Melmetal changes"

This reverts commit 8c4a04e67c048037262ad0c847ebaff88cd1d110.

* Reapply "Revert Melmetal changes"

This reverts commit 75539720111b37abaf657512441a04c3e6e7cbe3.

* Add explanation comment

* Remove test

* Comment
---
 data/rulesets.ts                  |  6 ++++++
 sim/team-validator.ts             |  8 +++++++-
 test/sim/team-validator/events.js | 14 ++++++++++++++
 3 files changed, 27 insertions(+), 1 deletion(-)

diff --git a/data/rulesets.ts b/data/rulesets.ts
index 8472973ebd..d3a7cfb690 100644
--- a/data/rulesets.ts
+++ b/data/rulesets.ts
@@ -1606,6 +1606,12 @@ export const Rulesets: import('../sim/dex-formats').FormatDataTable = {
 			this.add('rule', 'Terastal Clause: You cannot Terastallize');
 		},
 	},
+	fullarceusclause: {
+		effectType: 'ValidatorRule',
+		name: 'Full Arceus Clause',
+		desc: "Allows Level 80 Arceus from Hall of Origin",
+		// Implemented in sim/team-validator.ts
+	},
 	inversemod: {
 		effectType: 'Rule',
 		name: 'Inverse Mod',
diff --git a/sim/team-validator.ts b/sim/team-validator.ts
index 91eea6d65c..58d68c1c95 100644
--- a/sim/team-validator.ts
+++ b/sim/team-validator.ts
@@ -650,6 +650,7 @@ export class TeamValidator {
 			}
 		}
 		if (species.id === 'melmetal' && set.gigantamax && this.dex.species.getLearnsetData(species.id).eventData) {
+			// Gigantamax Melmetal cannot be obtained through the Max Soup
 			setSources.sourcesBefore = 0;
 			setSources.sources = ['8S0 melmetal'];
 		}
@@ -955,7 +956,12 @@ export class TeamValidator {
 				}
 			}
 		} else if (ruleTable.has('obtainablemisc') && (eventOnlyData = this.getEventOnlyData(outOfBattleSpecies))) {
-			const { species: eventSpecies, eventData } = eventOnlyData;
+			const eventSpecies = eventOnlyData.species;
+			let eventData = eventOnlyData.eventData;
+			if (ruleTable.has('fullarceusclause') && eventSpecies.baseSpecies === 'Arceus') {
+				// Hall of Origin Arceus
+				eventData = [...eventData, { generation: 4, level: 80, moves: ['refresh', 'futuresight', 'recover', 'hyperbeam'] }];
+			}
 			let legal = false;
 			for (const event of eventData) {
 				if (this.validateEvent(set, setSources, event, eventSpecies)) continue;
diff --git a/test/sim/team-validator/events.js b/test/sim/team-validator/events.js
index 3132ca4a67..2100fddf14 100644
--- a/test/sim/team-validator/events.js
+++ b/test/sim/team-validator/events.js
@@ -181,4 +181,18 @@ describe('Team Validator', () => {
 		];
 		assert.legalTeam(team, 'gen4anythinggoes');
 	});
+
+	it(`should allow Hall of Origin Arceus with Full Arceus Clause`, () => {
+		let team = [
+			{ species: 'arceus', level: 80, ability: 'multitype', moves: ['judgment'], evs: { hp: 1 } },
+		];
+		assert.false.legalTeam(team, 'gen4anythinggoes');
+		assert.false.legalTeam(team, 'gen4anythinggoes@@@fullarceusclause');
+
+		team = [
+			{ species: 'arceus', level: 100, ability: 'multitype', moves: ['judgment'], evs: { hp: 1 } },
+		];
+		assert.false.legalTeam(team, 'gen4anythinggoes');
+		assert.legalTeam(team, 'gen4anythinggoes@@@fullarceusclause');
+	});
 });