Kevin's Alien Force Mutation

In Vengeance of Vilgax, while Ben was trying to hack the Omnitrix, the Omnitrix overloaded. Kevin tried to help Ben by trying to override the system, but instead he got blasted by the feedback that the Omnitrix created. The blast rewrote his Osmosian DNA, causing him to mutate into a segmented, living colossus composed of the various matter aliens in the Codon Stream are made of. During his time in this form, Kevin learned that he can shapeshift his limbs into various tools, weapons, and forms and had limited regenerative abilities. In addition, his enhanced strength and durability were further increased.

In Trade-Off, Kevin teamed up with Darkstar to turn back to normal. He succeeds but lost his powers, making him useless in battle to the team. Gwen finds out what he did and goes after Darkstar. Darkstar then absorbs all of her power, and Ben's while he was Swampfire then Kevin realizes the only way to save her is to stop Darkstar. After stopping Darkstar, he got his mutation back (so did Darkstar), and Gwen and Ben were saved.

In Time Heals, Gwen tried to turn him back to normal by going back in time and stopping the disaster, but later learned that it had to happen after witnessing a future in which Charmcaster had killed the native Gwen, imprisoned Ben, and made Kevin a rock slave, all because Kevin had lacked his advanced abilities during a crucial battle.

Kevin turned back to normal in The Final Battle: Part 2 when the Omnitrix is destroyed. According to Max, it must have been the Omnitrix's energy that had kept him in that form, meaning that, unlike his first mutation, his DNA would not have restored itself so long as the Omnitrix was functioning. After returning to normal, Kevin retained the ability to shapeshift his limbs.

When asked if Kevin could turn back into his second mutation, Eugene replied: "Not without consequences".

Appearance

 * Kevin: Frame; Briefs.
 * Taydenite: Left half of his face.
 * Concrete: Right half of his face; left half of his chest and back; upper right half of his chest and back; and left arm.
 * Metal: Lower right half of his chest; upper right half of his back; lower back, stomach; right arm.
 * Wood: Legs.

Powers and Abilities

 * Enhanced Strength
 * Enhanced Durability
 * Regeneration
 * Body Alteration