Bowser Jr is the eight and youngest son of Bowser and Mistress Nine. He wields a paintbrush, and first appeared in the GameCube game Super Mario Sunshine, like Petey Pirhana and Toadsworth. Like his mom and dad, Bowser Junior debuted in as a cameo in Pooh's Adventures of Star Wars Episode II: Attack of the Clones then Winnie the Pooh vs. Hook. He joined forces w/ Captain Hook and kidnapped Jack, Maggie and their uncle in-law Christopher Robin. He later returned in Pooh's Adventures of Star Wars Episode III: Revenge of the Sith as a Seperatist Leader and there was spared by Darth Vader. He and his parents came back in Pooh's Adventures of Star Wars Episode VI: Return of the Jedi, where they along with Team Rocket teamed with Vader and the Emperor, but were then defeated and trapped by Mewtwo's ghost trap. He returned with his parents in Pooh's Adventures of Scooby-Doo and the Witch's Ghost and teamed up with Ben Ravencroft. In Pooh's Adventures of Cool Runnings, he became and good guy with his parents, Dr. Eggman and Metal Sonic for one time when help the heroes compete in the Winter Olympics, but they left early during the celebrations. He then made a relationship with Ranamon, a digimon, who then becomes his girlfriend, they appeared together with his parents in Winnie the Pooh Goes to FernGully: The Last Rainforest, which they teamed up with Hexxus to destroy FernGully along with Winnie the Pooh and his friends, but were ended up being blown away by Calmaramon's out-of-controlled Titanic Tempest attack. the four returned in Winnie the Pooh Meets Inspector Gadget, where they joined forces with Dr. Claw, but were defeated and escaped through a warp hole, leaving Claw to go to jail And in Winnie The Pooh In Fantasmic After They Helped The Rangers To Get The Ninja Powers He Holds The Powers of The Dreaded Prince Olympius As His New Super Form.
- In Wrath of Apocalypse, he is exiled by the first mutant after Apocalypse and some of his minions kill his mother and father. He is found by Nebula, Black Dwarf, and the Grand Duke of Owls and recruited into Thanos' cause.