|Devolved Form||Ben Tennyson|
|Powers and abilities|
|Abilities|| Any powers of the Ultimatrix's aliens and Ultimates|
|Voice Actor||Sean Donnellan|
|First Appearance||Ben 10,000 Returns|
Ultimate Ben is the evolved form of Ben Tennyson.
Ultimate Ben's appearance does not change. Instead, the Ultimatrix face is set on the center of his chest with the four prongs that symbolize that the evolutionary function has been activated.
A large hologram of the alien he chooses appears in green colour whenever he accesses their powers.
Powers and Abilities
Ultimate Ben pronounces the name of any alien he chooses (though it is not necessary) and presses the evolved Ultimatrix symbol on his chest to gain the powers of an alien that he chooses from his Ultimatrix.
Ultimate Ben's size changes depending on the size of his chosen alien, as seen where he accessed Ultimate Humungousaur's powers, Ultimate Ben's body frame increased to match Ultimate Humungousaur.
Known Powers Accessed
- Ultimate Humungousaur's strength
- Arctiguana's ice breath
- Heatblast's fire projection
- Clockwork's time rays
- Spidermonkey's agility
- Jetray's flight
- XLR8's speed
- Diamondhead's diamond generation and projectiles
- Ben 10,000 considers Ultimate Ben to be his best transformation.