Caillou/Adventure Time (2010)

Cast
More Ideas?
 * Leo as Finn
 * Numbuh 2 (from Codename: Kids Next Door) as Jake
 * Slim (from A Bug's Life) as Ice King
 * Sarah as Lady Rainicorn
 * Little Miss Chatterbox (from The Mr. Men Show) as Princess Bubblegum
 * Tai Lung (from Kung Fu Panda) as Lumpy Space Princess
 * Shenzi (from The Lion King) as Marceline The Vampire Queen