Jake the Dog is one of the main characters of Adventure Time. He is a dog/shape-shifter hybrid, referred to by others as a "magical dog," and he is Finn's constant companion, best friend, and adoptive brother. This is the FIRST APPEARANCE of this character in premium digital format. This series is available in the China region. Adventure Time and all related characters and elements as well as all other Cartoon Network characters and related elements are trademarks of and © Cartoon Network.