Pokémon: Black and White - Adventures in Unova. Butterfree and Me!

The adventures of Ash Ketchum, with his friends Cilan and Iris, as they traverse the Decolore Islands. On Wayfarer Island, Ash and his friends see the native Metapod and Butterfree. When they find a Caterpie who has not yet evolved, Ash helps the very lazy Pokémon join the rest of its friends, remembering the times he had raising his own Butterfree years before.