From fa01067b24566fa677ad7f3c610bf2178a233fb7 Mon Sep 17 00:00:00 2001
From: Karthik Bandagonda <32044378+Karthik99999@users.noreply.github.com>
Date: Wed, 27 May 2026 21:29:03 -0400
Subject: [PATCH] Champions: Reveal Nature in Open Team Sheets (#12063)

---
 sim/battle.ts         | 2 +-
 sim/team-validator.ts | 4 +++-
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/sim/battle.ts b/sim/battle.ts
index f95c8ea2d5..7a4d67aa65 100644
--- a/sim/battle.ts
+++ b/sim/battle.ts
@@ -3213,7 +3213,7 @@ export class Battle {
 					item: set.item,
 					ability: set.ability,
 					moves: set.moves,
-					nature: '',
+					nature: this.format.mod === 'champions' ? set.nature : '',
 					gender: pokemon.gender,
 					evs: null!,
 					ivs: null!,
diff --git a/sim/team-validator.ts b/sim/team-validator.ts
index fdf4965213..21585d0927 100644
--- a/sim/team-validator.ts
+++ b/sim/team-validator.ts
@@ -782,8 +782,10 @@ export class TeamValidator {
 		problem = this.checkAbility(set, ability, setHas);
 		if (problem) problems.push(problem);
 
-		if (!set.nature || dex.gen <= 2) {
+		if (dex.gen <= 2) {
 			set.nature = '';
+		} else if (!set.nature) {
+			set.nature = 'Serious';
 		}
 		nature = dex.natures.get(set.nature);
 		problem = this.checkNature(set, nature, setHas);