Ben 10: Season 1

Most kids dream of becoming a superhero, and wishes come true for 10-year-old Ben Tennyson when a mechanical enigma known as the Omnitrix changes him into 10 alien heroes, each with its own set of superpowers. It's quite a handful to be a regular boy one minute and an alien hero the next! In Season 1 of the animated series, Ben transforms into a crystalline creature, a super speedy lizard and a 12-foot giant with armored skin, among other forms.