"It's Hero Time." -Ben's catchphrase
Ben Tennyson (voiced by Tara Strong as a kid and later Yuri Lowenthal as a teen and Fred Tatasciore as Ben 10,000 ) is a heroic kid who finds a watch from outer space that allows him to transform into 10 different aliens.
Click the link here to see more of Ben's Alien Transformations: Omnitrix Heroes .
- Heatblast (voiced by Steve Blum)
- Wildmutt (voiced by Dee Bradley Baker)
- Diamondhead (voiced by Jim Ward)
- Four Arms (voiced by Richard McGonagle)
- Grey Matter (voiced by Richard Horvitz)
- XLR8 (voiced by Jim Ward)
- Ripjaws (voiced by Fred Tatasciose)
- Stinkfly (voiced by Dee Bradley Baker)
- Ghostfreak (voiced by Steve Blum)
- Upgrade (voiced by Tara Strong)
- Cannonbolt (voiced by Fred Tatasciose)
- Wildvine (voiced by Jim Ward)
- Upchuck (voiced by Dave Wittenberg)
- Ditto (voiced by Rob Paulsen)
- Eye Guy (voiced by Dee Bradley Baker)
- Frankenstrike (or Benvicktor) (voiced by Michael Dorn)
- Blitzwolfer (or Benwolf) (voiced by Tara Strong)
- Snare-oh (or Benmummy) (voiced by Richard Green)
- Way Big (voiced by Fred Tatasciose)
- Swampfire (voiced by Dee Bradley Baker)
- Big Chill (voiced by Dee Bradley Baker)
- Humongosaur (voiced by Dee Bradley Baker in Alien Force and Ultimate Alien and John DiMaggio in Omniverse)
- Chromastone (voiced by Dee Bradley Baker)
- Echo Echo
Alien forms unlocked in the series
- Ben will meet Jeffrey, Jaden and their team in Jeffrey, Jaden & Friends meet Ben 10.
- Ben will meet Twilight, Kyle and their team in Twilight & Kyle meets Ben 10.
- Through the course of the series, Jeffrey becomes one of Ben's mentors. They develop a teacher and student type of friendship that is similar to that of Obi-Wan Kenobi and Anakin Skywalker. Eventually, Jeffrey trains Ben in the ways of the Keyblade and gives him one.
- Ditto is Ren the God of Humor's favorite alien form.
- Heatblast is Tigerman531's favorite alien form.