Ben 10

Ben 10 is an animated series that follows the adventures of 10-year-old Benjamin "Ben" Tennyson, his cousin Gwen, and Grandpa Max as they travel the country during summer vacation. Ben discovers a mysterious watch called the Omnitrix that transforms him into 10 different aliens, giving him superpowers and the ability to fight enemy aliens. The series is a re-imagining of the original Ben 10 franchise and features a new storyline, characters, and animation style.

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Some TV shows that have similar genres and were produced around the same time as Ben 10 include Dino Ranch, Slumberkins, Bottersnikes & Gumbles, Totally Spies!, The Powerpuff Girls, Pokémon Master Journeys.