The hilariously overpowered legendary pokemon Mewtwo is returning to the series after a long, and justifiable, absence. His emergence comes in the form of a downloadable character for Pokemon Black and White, as well as a card for the collectible card game. Other Mewtwo-themed offerings abound. Also, check out the Mewtwo timeline to see why this classic Pokemon character was sent riding off into the sunset in the first place. Gamesradar has the story.