Ben 10: Ultimate Alien follows the adventures of Ben Tennyson, a teenager who has become a world-renowned superhero after his secret identity was revealed to the public. With the help of his friends and family, Ben must learn to master the powers of the Ultimatrix, a modified version of the Omnitrix that allows him to evolve into more powerful alien forms. As he battles against evil forces, Ben also faces the challenges of his new-found fame and struggles to maintain a balance between his superhero life and his personal life. With the fate of the world at stake, Ben must use his powers to protect humanity and defeat his enemies in this thrilling animated series.

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Some TV shows that have similar genres and were produced around the same time as Ben 10: Ultimate Alien include Winx Club, Mega Man: Fully Charged, Jayce and the Wheeled Warriors, Ben 10: Omniverse, Digimon Adventure, Dex Hamilton: Alien Entomologist.