Ultimate Humungousaur

Ultimate Humongousaur 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.

Abilities
He can "transmutate" his hands into flat circles, and the four bone caps on his knuckles become small ports firing kinetically unstable bone fragments. Plus he has a spiked mass on the end of his tail. He also has a spiked shell on his back. He also possesses superhuman strength (twice as strong as full-size Humongousaur).

Ben 10 Alien Force

 * The Final Battle: Part 1 (used by Albedo; First Appearance)
 * The Final Battle: Part 2 (used by Albedo)

Ben 10: Ultimate Alien

 * Too Hot To Handle 
 * Hero Time

Ben 10 Ultimate Alien: Cosmic Destruction
Ultimate Humongousaur is a playable alien in Ben 10: Ultimate Alien: Cosmic Destruction, on all platforms/consoles/hand-held devices (PS3, Wii, PSP, DS, X-Box 360, and PS2). The alien's normal form is playable also.

Toys

 * 4 inch Alien Collection Ultimate Humongousaur
 * 10 cm DNA Alien Heroes Ultimate Humongousaur
 * 4 inch DX Alien Collection Ultimate Humongousaur

Trivia

 * Ultimate Humongousaur is taller than his devolved form's normal size.
 * Albedo first transformed into this alien which is a reference to Albedo's first on screen transformation into Humongousaur in Alien Force to attack the Forever Knights.
 * Ultimate Humongousaur 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 has only appeared four times so far (counting the Ben 10: Alien Force episodes in which he was used by Albedo).
 * His shell resembles Bowser's shell from the Mario series.
 * Ultimate Humongousaur was Albedo's first evolved form and was his last alien he used with the Ultimatrix.
 * Ultimate Humongousaur is the most used Ultimate alien so far.
 * He resembles an Ankylosaurus.

Normal Form

 * Humongousaur