diff --git a/config/formats.ts b/config/formats.ts
index 5a8a117d01a9..f1302aef646e 100644
--- a/config/formats.ts
+++ b/config/formats.ts
@@ -243,7 +243,7 @@ export const Formats: FormatList = [
 		name: "[Gen 2] IU",
 		mod: 'gen2',
 		searchShow: true,
-		ruleset: ['[Gen 2] IU'],
+		ruleset: ['[Gen 2] SU'],
 		unbanlist: ['Swagger'],
 		banlist: ['SU', 'IUBL'],
 	},
diff --git a/data/tags.ts b/data/tags.ts
index 026d58f391b9..baa1950d03e6 100644
--- a/data/tags.ts
+++ b/data/tags.ts
@@ -184,6 +184,14 @@ export const Tags: {[id: string]: TagData} = {
 		name: "SUBL",
 		speciesFilter: species => species.tier === 'SUBL',
 	},
+	"iu": {
+		name: "IU",
+		speciesFilter: species => species.tier === 'IU',
+	},
+	"iubl": {
+		name: "IUBL",
+		speciesFilter: species => species.tier === 'IUBL',
+	},
 	"6ubl": {
 		name: "6UBL",
 		speciesFilter: species => species.tier === '6UBL',