Roy and Viv turn the people of Earth into mindless dancers after wishing to write the catchiest song of all time as a way to save their parents' dance studio.

FLASHBACK EPISODE! It's Viv's first day of school, and she wishes to be the Most Popular Person, but it's more difficult than she realized. Meanwhile, Roy, conflicted over his own popularity, wishes for a loyal dog... who happens to bite butts.

Roy unleashes a giant fish monster Codzillard on Dimmsdale in an attempt to convince Viv to stay in Dimmsdale after her best friend from Oldsburg tries to persuade her to move back.