3x17 - The Angry Beavers

Dagget becomes Muscular Beaver yet again, and this time he's in the clutches of "Toe-Bot". Norb's planning a big party, but he reluctantly becomes Baron "Once-Bad-Then-Good-Then-Bad-Again-Now-Good-Again" Beaver in order to "save" Musuclar Beaver. Fortunately for Norbert, when his guests (Treeflower, Barry, Bing, Truckie, and Stump) show up, they think it's a superhero-themed costume party, and become "The Justice Guys (And One Gal)" in order to help fight Toe-Bot.