James Jonah "Jim" Cummings (born November 3, 1952) is an American voice actor. One of the most popular and seasoned voice actors in the country, Cummings might be best recognized for roles such as Leatherhead and The Shredder (whenever James Avery was unavailable) on Teenage Mutant Ninja Turtles, the current voice of the Tazmanian Devil from almost every Looney Tunes cartoon since Taz-Mania, Dr. Robotnik in Sonic the Hedgehog, Monterey Jack and Fat Cat on Chip n' Dale Rescue Rangers, Darkwing Duck and Negaduck from Darkwing Duck, the current voice of Peg-Leg Pete, Cat from CatDog (opposite Tom Kenny), Lord Boxman from OK K.O.! Let's Be Heroes, Morocco Mole in Super Secret Secret Squirrel, MODOK in Iron Man, Cat from Catdog, Ackar in Bionicle: The Legend Reborn, Thor in the game Marvel Ultimate Alliance 2, Thanos in The Super Hero Squad Show Season 2 (taking over from Steve Blum), Hondo Ohnaka in Star Wars: The Clone Wars and most of all, Winnie the Pooh (and Tigger too!).
If we were to put up more of his roles on this page, it would be very long. Let's just say that Disney probably has him on speed-dial.