Ultimate Humungousaur

Ultimate Humungousaur is the evolved form of Humongousaur. He first appears in Ben 10 Alien Force in The Final Battle: Part 1 where it is first used by Albedo to fight Ben. Ben first used him in the Ben 10: Ultimate Alien episode, Too Hot To Handle. He is voiced by Dee Bradley Baker.

Abilities
He can "transmutate" his hands into flat circles, and the four bone caps on his knuckles become small ports, firing pellets of bone packed with explosive material to simulate missile launchers. He also has superhuman strength (more than twice as strong as Humongousaur) which is enough to take out Humongousaur with only a few hits, and vast resistance to injury. He has a spiked armor covering his body. He also can hit his enemies with the mace on the end of his tail.He can grow 120 ft. tall.

Trivia

 * In his normal size, Ultimate Humongousaur is twice as tall as his devolved form.
 * Humungousaur is the first evolved alien to be seen in the series.
 * In the Cartoon Network online game TKO, Ultimate Humongousaur is a playable character. Even though he is locked, the only way to unlock Ultimate Humongousaur is to win three instant matches while logged in.
 * He is the only appeared four times so far (counting the Ben 10: Alien Force episode in which he was used by Albedo).
 * His shell resembles Bowser's shell from the Mario series. It is shown that when Ultimate Humongousaur lifts something heavy, he can get cramps.
 * Ultimate Humongousaur was Albedo's first evolved form and was his last alien he used with the Ultimatrix.

Hero form

 * Humongousaur