Avenging Keith (again kinda sorta) is the first episode of Bakugan: War of the Worlds. In this episode, Gus goes to Gundalia to avenge Keith whom Barodius tried to kill. He tried to kill him by blowing up the Exokor Transformation Hub after it disconnected from Collosus Dharak.
Gus Grav vs. Emperor Barodius
Winner: Emperor Barodius
Preceded By: Gundalian Invaders
Followed By: Dharaknoid and Dragonoid
The Vestals are seen for the first time since Final Fury
Phantom Dharak evolves into Chaos Dharak
A Cathigan is shown; but not seen by anyone (Dan, Barodius...) It is seen by you.