Butterfree

Butterfree (バタフリー Butterfree) is a Bug/Flying-type Pokémon and is the evolved form of Metapod and the final form of Caterpie. Metapod evolve into Butterfree starting at level 10.

Appearance
Butterfree is an insect-like Pokémon appearing as a large butterfly. Butterfree have a large purple body with light blue limbs and a nose. It's eyes are quite large in proportion to its head and are a red colour. Butterfree's large wings appear simply as black and white butterfly wings.

Special Abilities
All Butterfree have the ability Compoundeyes which raises its accuracy rating by 30%. Outside of battle, Compoundeyes will raise the chances of finding a Pokémon with an item if the user is in the lead slot of the party.

In battle, it flaps its wings at high speed to release highly toxic dust into the air.

In Anime
Butterfree first appeared in Pokémon Anime episode Challenge of the Samurai where Ash's Metapod evolved into a Butterfree near the episodes end. Ash used this Butterfree on a number of different occasions but eventually released it in the episode Bye-Bye Butterfree.

In Game
Butterfree is a Generation I Pokémon, as it first appeared in the original Pokémon games. It is the fully-evolved form of Caterpie and evolves from Metapod at level 10, making it a Stage 2 Pokémon. Player's can only catch a Butterfree straight from the wild in Pokémon Gold and Silver.

Level-Up

 * Bold indicates that this Pokémon gains STAB from this attack.