From efb0433dbe06dfd544cf1de21fb0cc09ef090948 Mon Sep 17 00:00:00 2001
From: Kris Johnson <11083252+KrisXV@users.noreply.github.com>
Date: Tue, 14 Mar 2023 17:44:50 -0600
Subject: [PATCH] FIx crash with Force Monotype (#9467)

---
 data/rulesets.ts | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/data/rulesets.ts b/data/rulesets.ts
index 8585a18682..dcf553a982 100644
--- a/data/rulesets.ts
+++ b/data/rulesets.ts
@@ -441,13 +441,21 @@ export const Rulesets: {[k: string]: FormatData} = {
 		desc: `Forces all teams to have the same type. Usage: Force Monotype = [Type], e.g. "Force Monotype = Water"`,
 		hasValue: true,
 		onValidateRule(value) {
-			if (!this.dex.types.get(value).exists) throw new Error(`Misspelled type "${value}"`);
+			const type = this.dex.types.get(value);
+			if (!type.exists) throw new Error(`Misspelled type "${value}"`);
+			// Temporary hardcode until types support generations
+			if (
+				(['Dark', 'Steel'].includes(type.name) && this.dex.gen < 2) ||
+				(type.name === 'Fairy' && this.dex.gen < 6)
+			) {
+				throw new Error(`Invalid type "${type.name}" in Generation ${this.dex.gen}`);
+			}
 		},
 		onValidateSet(set) {
 			const species = this.dex.species.get(set.species);
 			const type = this.dex.types.get(this.ruleTable.valueRules.get('forcemonotype')!);
 			if (!species.types.map(this.toID).includes(type.id)) {
-				return [`${set.species} must have type ${type.name}`];
+				return [`${set.species} must have ${type.name} type.`];
 			}
 		},
 	},