Aliens Introduced in Ben 10: Alien Force
Swampfire
Voiced by:
Dee Bradley Baker - Ben 10: Alien Force, Ben 10: Ultimate Alien
David Kaye - Ben 10 Omniverse, Ben 10: Omniverse 2 (video game)
Swampfire is a Methanosian from the planet Methanos (referring to methane), a living plant alien with superhuman strength and ability to create fire from the methane produced by his body. Besides being able to control plant life and producing seeds that quickly grow into vines, Swampfire also has a vast regenerative ability that allows him alter his own body. This expresses itself in such ways as tunnelling underground in vine form, growing his feet to root himself into the ground, healing his lost limbs or producing other ones; this ability makes him almost indestructible. However, Swampfire is more vulnerable than Heatblast because he can be frozen for periods of time, unlike Heatblast, who is completely invulnerable to cold. He may look like a walking compost heap but he is one of the most powerful ones.
He appeared in pilot episode of Ben 10 Alien Force, in "Ben 10 Returns: Part 1" after the Omnitrix had recalibrated, to fight the DNAliens, Forever Knights and defeat Kevin.
In Ben 10: Omniverse, his design is changed and has five fingers on his hands. Swampfire's skin is now olive green, and his arms are larger. The red petals on his shoulder, along with the green thorns on his body, are thinner and longer. His torso design has changed, splitting the black parts on his waist into two. The Omnitrix symbol has also moved from his chest to his stomach. Swampfire underwent a transformative phase during the events of "Charmed, I'm Sure".