Gary the Goldfish had one dream in life: to become a human. His owner, an eccentric inventor named Professor Wigglesworth, had built a machine that could supposedly "swap the consciousness of any two beings." Gary overheard the professor bragging about it to the mailman and thought, Finally, my chance to experience tacos!

One night, when Professor Wigglesworth fell asleep on the couch surrounded by half-eaten pizza rolls, Gary flopped out of his tank and used his tail to slap buttons on the machine. The professor woke up just...