"Once in a Blue Toon" is the twenty-fifth episode of Bonkers.
Piquel and Bonkers have been chosen for a Toon reforming program starting with a Toon that eats everything in sight called Louse. The program does not go well with Louse, but Piquel's anger prompts him into behaving.
Unfortunately at the end of the episode Lucky has to reform several more Louses.
The episode's title is a pun on the phrase "Once in a blue moon".