diff --git a/src/data/mystery-encounters/mystery-encounters.ts b/src/data/mystery-encounters/mystery-encounters.ts
index 5dd952b2bce..1a36dc27df2 100644
--- a/src/data/mystery-encounters/mystery-encounters.ts
+++ b/src/data/mystery-encounters/mystery-encounters.ts
@@ -226,9 +226,9 @@ const anyBiomeEncounters: MysteryEncounterType[] = [
  */
 export const mysteryEncountersByBiome = new Map<Biome, MysteryEncounterType[]>([
   [Biome.TOWN, []],
-  [Biome.PLAINS, [MysteryEncounterType.SLUMBERING_SNORLAX, MysteryEncounterType.ABSOLUTE_AVARICE]],
+  [Biome.PLAINS, [MysteryEncounterType.SLUMBERING_SNORLAX]],
   [Biome.GRASS, [MysteryEncounterType.SLUMBERING_SNORLAX, MysteryEncounterType.ABSOLUTE_AVARICE]],
-  [Biome.TALL_GRASS, [MysteryEncounterType.ABSOLUTE_AVARICE]],
+  [Biome.TALL_GRASS, [MysteryEncounterType.SLUMBERING_SNORLAX, MysteryEncounterType.ABSOLUTE_AVARICE]],
   [Biome.METROPOLIS, []],
   [Biome.FOREST, [MysteryEncounterType.SAFARI_ZONE, MysteryEncounterType.ABSOLUTE_AVARICE]],
   [Biome.SEA, [MysteryEncounterType.LOST_AT_SEA]],