Trash Wormadam

Diamond: When BURMY evolved, its cloak became a part of this Pokémon’s body. The cloak is never shed.

Pearl +2: Its appearance changes depending on where it evolved. The materials on hand become a part of its body.

Platinum +4: When evolving, its body takes in surrounding materials. As a result, there are many body variations.

HeartGold / SoulSilver: It is said that a WORMADAM that evolves on a cold day will have a thicker cloak.

Y / Alpha Sapphire: When Burmy evolved, its cloak became a part of this Pokémon’s body. The cloak is never shed.