Atomic Betty (2004)

S1E3 But the Cat Came Back!

Betty can’t wait for the school dance, but her mom makes one thing clear: her room has to be spotless before she leaves. The problem is Purssy keeps sneaking in while she’s off on galactic missions, trashing the place every time. Frustrated, Betty finally teams up with an alien dragon to scare him off for good. With the mess sorted and Purssy out of the way, she’s just in time to head to the dance with Noah.