"Ben 10" originally follows the adventures of Ben Tennyson, a young boy who discovers a device called the Omnitrix that allows him to transform into various alien creatures, each with unique abilities. The series, created by Man of Action (a group consisting of comic book writers Joe Casey, Joe Kelly, Duncan Rouleau, and Steven T. Seagle), has undergone several reboots and iterations over the years, including "Ben 10: Alien Force," "Ben 10: Ultimate Alien," "Ben 10: Omniverse," and more recent series.
Fan-made works often use titles like the one you've described. These are typically: