To do this, The Wise Old Hermit summoned "The Chosen Ones" to stop him (Spongebob Squarepants, Patrick Star, Sandy Cheeks, Squidward Tenticles, Danny Phantom, Sam Manson, Tucker Foley, Timmy Turner and Jimmy Neutron). The Chosen Ones had to overcome many challenges and enemies, both weak (like sand monsters and seagulls) and strong (like The Great Carapace) until they finally got to The Mawgu. A great battle ensured.
While Timmy, Patrick, Sandy and Sam distracted the monster and Danny and Spongebob fought it and it's minions (with a little help from Squidward), Tucker had finished the Rip-Zipper he and Jimmy were working on and sealed The Mawgu inside the "Rip" right after he says "This isn't over, Chosen Ones!". Finally, the island is at peace and the islanders have carved the heroes faces into the side of a mountain.
Roll in the Series
The Mawgu will return in the Season 13th finale 5 part episode of the Spongebob and Friends Chronicle Adventure Series to wreak vengence on Spongebob, Jimmy, Timmy, Danny, Patrick, Squidward, Sandy, Sam and Tucker by courrupting the lougers into his new minons with his corrupted ooze, steal the energy from their home worlds again and pollute the Destiny Islands including Kairi, Sora and Riku's hometown with the goo. But a prophecy from the Wise Old Hermit Crab has fortold that the Chosen Ones will ban together with the saviors of Eqlantica (Spyro, Sparx, Kairi, Cynder, Riku, Trixie, Gilda, Twilight Sparkle, Spike, Applejack, Rainbow Dash, Pinkie Pie, Fluttershy, Rarity and The Cutie Mark Crusaiders: Applebloom, Sweetie Belle and Scootaloo with the help of Discord) in order to defeat the Mawgu Again but the true key to Victory is the power of a Brother and Sister's love.