The Secret Origin of Supernova

The Secret Origin of Supernova is the second half of the 10th episode of Season 13. It first aired on April 9, 2010 along with Looking for Bonnie.

Summary
Arthur is dismayed when he learns that the energy drink endorsed by Dark Bunny, his favorite super hero, is unhealthy. He goes in search for a new superhero who doesn't sell out from their principles, and ends up making his own superhero named Supernova.

Triva

 * The kindergarteners are identical to the kids at the Elwood City Preschool.
 * Supernova is a parody of the Marvel Comics hero "Nova"