Ash and co. are now in the enemies clutches where they meet Dr. Namba, the man responsible for amplifying Cassidy and Butch's pokemon. His plan was to use the agression amplification device on Lugia. Will his evil plan succeed? And how can Ash and co. stop him?
This episode is the final part of the 13 part Whirl Islands arc.
This is the last episode Cassidy was voiced by Megan Hollingshead before the role was passed to Andi Whaley, however, her role as Nurse Joy continued until AG040: Watt's with Wattson?