Ultimate Swampfire

Ultimate Swampfire is Ben's ultimate form of Swampfire. It was first used by Ben to fight Vilgax in The Final Battle: Part 2, making it Ben's first ultimate transformation, a reference to Ben's transformation to regular Swampfire in Ben 10 Alien Force, being his first transformation when puts on the Omnitrix again. He will appear in Ultimate Alien, as one of Ben's new aliens. He is voiced by Dee Bradley Baker.

Appearance
After the induced evolution, Swampfire now appears as humanoid tree with three blue gooey shells containing an organic, blue-colored kerosene gel-like solution, (as said by Dwayne,) that Ultimate Swampfire shoots out and ignites, creating more intense, blue-colored flames. He is the same height as swampfire. He has many of the same abilities. His Ultimatrix sign is on his chest .He also has the same feet as Swampfire.

Abilities
His pyrokinetic and chlorokinetic abilities are greatly increased, and he can still regenerate body parts. His speed is also slightly decreased but he makes up for it with his lethal fire bombs that have knocked even Vilgax out cold. Ultimate Swampfire shoots blue flames while Swampfire shoots ordinary-colored fire. He also shoots a huge beam when he combines his hands together!

Trivia

 * Ultimate Swampfire is the first alien Ben used as "Ultimate", reflecting on how Swampfire was the first alien Ben used in Alien Force, as well as Ben's first ultimate transformation with the Ultimatrix.
 * He is the alien in an online Ben 10 3D game called Ultimate Crisis
 * in a Beta Ben10 action comic cover Ultimate Swampfire appeared to be colored red.

Hero Form

 * Swampfire