Bolt (2008)

Bolt (2008) (voiced of john travolta) is a story of American white shephered who lives in his whole life in a popular television show who believe that he has superpowers.
When he was accidentally shipped off from hollywood to New york and departed his owner, he has to go back to the hollywood with the help of his two friends - Mittens (the cat) and the fat hamster in a plastic ball. Though their adventures, he found out that he has no superpowers at all and that the show was not for real.
This story is also very good movie for the whole family.
It is an animated comedy film produced by walt disney animation studios directed by Chris Williams.