Following their previous encounter with Space Monster M, The Aquabats crash-land back on Earth, awakening to realize they have no memory of what happened or who they are.
On the road home from a snowy ski trip, The Aquabats! encounter a body-snatching alien set on turning them into spaceship fuel. Crash evades capture and must overcome his fears to save his friends.
After a giant mutant "flea beetle" attacks a local supermarket, The Aquabats trace it to a nearby farm growing genetically enlarged produce, which happens to be run by Jimmy the Robot's estranged parents. Tensions rise between Jimmy and his eccentric scientist father over Jimmy having abandoned his farm life, but when a gigantic mutant worm swallows Jimmy's mother, the two must work together to rescue her.
The Aquabats spend the summer participating at Camp Radventures, a summer camp where kids are trained in The Aquabats' superpowers to become AquaCadets. When a group of campers are kidnapped in the middle of the night, the band realizes it's the work of a mythical shapeshifting beast, and the Commander's suspicions quickly fall upon the camp's beloved and irrepressibly perky counselor Jewel. Guest starring Leslie Hall as Camp Counselor Jewel.
Two competing bands who are seeking revenge on The Aquabats unite with the evil Silver Skull to become the AntiBats.