In her never-ending quest for popularity, Becky attempts to join the cheerleading squad. Donning a manky old bunny costume, she seems to begin bringing very good luck to those around her.

In her never-ending quest for popularity, Becky wants to join the cheerleading squad. The stuck-up girls on the squad won't let her, but do allow her to become the school mascot. Finding a ratty old rabbit costume in a neglected corner of the locker room, Becky puts it on and soon finds her luck changing. Along with the school's luck, too.

Good things begin to happen, from winning a game to scoring well on a test. But Becky, Templeton and Mitchell discover that for every piece of good luck the costume has brought, a corresponding piece of bad luck also occurs.