The galaxy's top villains, including Dark Truder and Deliria, compete for Villain of the Year honors; Zeeter is offered a position that would require her to leave the Zula Patrol, but before she can make up her mind, she and the team chase a space pirate, who's stealing stars.
Dark Truder wreaks havoc when he switches the labels of the minerals being shipped to manufacturing plants from Zula's mines and, while masquerading as a home-decorating guru, persuades the gang to replace the equipment at its headquarters; the team's space ship needs a new crystal to power it, so it heads to the mysterious Crystal Cavern, home of the infamous Big Toe.
The annual Ballet of the Water Striders is threatened by a pollutant that's preventing the water striders from forming their natural elastic layer; the gang tracks down Princess Marina's crown, which was stolen at her coronation.
Bula and Zeeter's investigation of a vanishing lake uncovers a nefarious plot by Dark Truder to vaporize all of Zula's water; a doo-wop trio needs the gang's help in a Battle of the Bands contest that pits them against a Dark Truder group.
Dark Truder's plan to take over the universe misfires when he accidentally releases several gremlin-like elements from their container; Multo explains chemical reactions by using the Sizerizer to shrink Bula and Zeeter to atomic size, but Gorga swallows them before he can revert them to normal size.
Wizzy and Wigg send away for space monkeys, but soon regret their decision when the mischievous critters make off with Zula Patrol headquarters; Deliria creates a monster blob that takes off on a path of destruction.
Venus refuses to pose for a picture of the solar system because of her retrograde rotation, which she thinks sets her too far apart from the other planets to fit in with them. Later, the Dark Truder targets the Zulean Crater Rater Society, whose knowledge he wants to use to make a giant-size golf course.
The gang helps Skip find his missing best friend, a worm named Wriggly. By the time she's found, however, she has changed into a butterfly and is worrying about whether Skip will still like her. Later, Deliria sets out to steal all of the frogs and their eggs on Zula in order to take over the planet.