Alvin Seville is the best-known and most promoted member of the fictional singing trio "The Chipmunks", which also comprises of his brothers Theodore and Simon.
Alvin, Simon, and Theodore appear in Cartoon All-Stars to the Rescue, a production which also saw the appearance of Michelangelo. Alvin appeared 26 years later in another crossover with TMNT characters, as a playable fighter in Super Brawl World.