Gummy Man

Gammy man is an alien in David 13 and Deo 12.

Appearance
Picture says it all

Powers
He can transform in to anything. He can shoot lasers. he can trow exploding balls and transform any one in to any thing

Weakness
when he transformes in to something the omnitrix symbol stays on his chest.

Deo 12
In Deo 12 He's an additonal alien and he first appears in episode  Some one new
 * Some one new
 * Toy store PT 2
 * Toy store PT 3
 * Season 3

David 13
In David 13 he is an orginal alien, He first appears in episode 5

Trivia

 * Gammy man is an alien made in Ben 10 alien maker