Jumanji: The Animated Series

When he and Judy find themselves in a bayou where Alan is battling some enormous leeches, Peter's picture of a boy drawn in bubbling mud comes to life. Although he's obnoxious kid whose sole goal is to have fun, Mud Boy may also be the key to their clue. When Judy lays down new rules to keep him in check, Mud Boy gets mad and kidnaps Peter. And while Mud Boy intends to destroy Alan and Judy, Peter must save them.