But the Cat Came Back! Atomic Betty : Season 1 Episode 3

Betty is excited to be going to a school dance, her mom will let her go on one condition, that her room is clean before she goes. However, Purssy keeps sneaking into Betty's room and messing it up while she's away on galactic missions. Betty finally scares him off - with help from an alien dragon - in time to accompany Noah to the dance.