diff --git a/src/timed-event-manager.ts b/src/timed-event-manager.ts
index e4a376ac366..926da91b352 100644
--- a/src/timed-event-manager.ts
+++ b/src/timed-event-manager.ts
@@ -50,7 +50,7 @@ const timedEvents: TimedEvent[] = [
     uncommonBreedEncounters: [
       { species: Species.GIMMIGHOUL },
       { species: Species.DELIBIRD },
-      { species: Species.STANTLER },
+      { species: Species.STANTLER, allowEvolution: true },
       { species: Species.CYNDAQUIL, allowEvolution: true },
       { species: Species.PIPLUP, allowEvolution: true },
       { species: Species.CHESPIN, allowEvolution: true },