Skrappy "all grown up"

 is Crazy Earl's beloved pet Skag, all grown up.

Involvement
Skrappy was once rescued from the Trash Coast where he had been penned by bandits for their skag-fighting ring. Later, after the defeat of The Destroyer, Skrappy grew up, outgrowing his saw blade collar and becoming hostile to any who approach Crazy Earl's bunker.

Strategy
Skrappy "all grown up" will rush to attack. Incendiary damage is useful in eliminating him quickly.