The Mawgu

The Mawgu is the main antagonist and final boss in Nicktoons: Battle for Volcano Island.

Nicktoons: Battle for Volcano Island
He escapes from his prison. He tries to get revenge on those who sealed him away, through the use of terrible ooze that can corrupt anything making them his minions. To prevent this the Wise Old Crab summons "The Chosen Ones" to stop him. They overcome many obstacles until reaching him. Timmy, Cosmo, Wanda, Sam,, and distract him while  and Danny fight him with some of 's help and while Tucker and Jimmy finish the Rip-Zipper.

After the Rip-Zipper is finished, he is sealed within the rip, but vows revenge.

Nicktoons: Attack of the Toybots
The Mawgu makes a cameo as a contestant on "The Biggest Genius" alongside.