diff --git a/public/images/items/moon_flute.png b/public/images/items/moon_flute.png
new file mode 100644
index 00000000000..4237a9b29ad
Binary files /dev/null and b/public/images/items/moon_flute.png differ
diff --git a/public/images/items/sun_flute.png b/public/images/items/sun_flute.png
new file mode 100644
index 00000000000..b7cbcdf5569
Binary files /dev/null and b/public/images/items/sun_flute.png differ
diff --git a/src/data/pokemon-evolutions.ts b/src/data/pokemon-evolutions.ts
index 5a4813f1a57..b0fa42104da 100644
--- a/src/data/pokemon-evolutions.ts
+++ b/src/data/pokemon-evolutions.ts
@@ -59,6 +59,8 @@ export enum EvolutionItem {
   AUSPICIOUS_ARMOR,
   MALICIOUS_ARMOR,
   MASTERPIECE_TEACUP,
+  SUN_FLUTE,
+  MOON_FLUTE,
 
   BLACK_AUGURITE = 51,
   PEAT_BLOCK,
@@ -987,11 +989,11 @@ export const pokemonEvolutions: PokemonEvolutions = {
     new SpeciesEvolution(Species.KOMMO_O, 45, null, null)
   ],
   [Species.COSMOG]: [
-    new SpeciesEvolution(Species.COSMOEM, 43, null, null)
+    new SpeciesEvolution(Species.COSMOEM, 23, null, null)
   ],
   [Species.COSMOEM]: [
-    new SpeciesEvolution(Species.SOLGALEO, 53, null, new SpeciesEvolutionCondition(p => p.scene.arena.getTimeOfDay() === TimeOfDay.DAY)),
-    new SpeciesEvolution(Species.LUNALA, 53, null, new SpeciesEvolutionCondition(p => p.scene.arena.getTimeOfDay() === TimeOfDay.NIGHT))
+    new SpeciesEvolution(Species.SOLGALEO, 53, EvolutionItem.SUN_FLUTE, new SpeciesEvolutionCondition(p => p.scene.arena.getTimeOfDay() === TimeOfDay.DAY), SpeciesWildEvolutionDelay.VERY_LONG),
+    new SpeciesEvolution(Species.LUNALA, 53, EvolutionItem.MOON_FLUTE, new SpeciesEvolutionCondition(p => p.scene.arena.getTimeOfDay() === TimeOfDay.NIGHT), SpeciesWildEvolutionDelay.VERY_LONG)
   ],
   [Species.MELTAN]: [
     new SpeciesEvolution(Species.MELMETAL, 48, null, null)
diff --git a/src/locales/en/modifier-type.json b/src/locales/en/modifier-type.json
index 64223b64b23..db16f979ce2 100644
--- a/src/locales/en/modifier-type.json
+++ b/src/locales/en/modifier-type.json
@@ -332,6 +332,8 @@
     "SACHET": "Sachet",
     "WHIPPED_DREAM": "Whipped Dream",
     "LEADERS_CREST": "Leader's Crest",
+    "SUN_FLUTE": "Sun Flute",
+    "MOON_FLUTE": "Moon Flute",
 
     "CHIPPED_POT": "Chipped Pot",
     "BLACK_AUGURITE": "Black Augurite",