Episode Detail: Attack of the Twonkies - The Adventures of Jimmy Neutron, Boy Genius
Part 1 of 2. Jimmy returns from a space mission with a stowaway: a small, lovable creature named Twonky. Soon the town is overrun with Twonkies, and a dangerous secret is revealed: The usually gentle animal becomes ferocious when exposed to music. Jimmy races to round up all the Twonkies and return them to their home on a passing comet before it leaves the solar system.