Atomix

Atomix is the Omnitrix's DNA sample of an unknown species from unknown planet.

Appearance
Atomix, in his first form, is a living embodiment of pure radioactive energy with visible skeleton. He is equipped with devices and mask that prevent his radiation from harming Humans. He wears the Omnitrix/Megatrix symbol on his left brace.

When he Mode Change into his second form, he become a humanoid robotic alien that is taller then any Ultim Vaxasaurian. He has a green and white body. He has large cylinders on his arms, near his wrists, that are full of a green energy with dark green bubble-like spheres, and these spheres constantly move on Atomix. He has the same energy on his Omnitrix-shaped chest. His mouth doesn't move when he talks and his head is a pointed, armored helmet.

Atomix wears the Omnitrix/Megatrix symbol on his green (or yellow) and white belt.

Powers And Abilities
As his name implies, Atomix can create and manipulate nuclear energy from his hands, which can do a massive amount of damage to its surroundings. Fundamentally, he is a walking nuclear reactor.

In his first form, he's capable of manipulate any atoms at will and rearrange them in different form. He can even change the atom of his own body, constructing them in various form such as weapons or gadgets.

He is also elastic enough to stretch his own body and can move around as a cloud of atom.

In his second form, he can manipulate his own energy into powerful attacks. The way he creates the blasts is by chanting "HAA-MEE-NA HAA-MEE-NA HAA-MEE-NA-HA!"

Atomix doesn't need to chant every time he does an attack but does so for some attacks so he can focus his power.

Atomix is able to activate his cylinders on his arms and his Omnitrix-shaped chest to melt nearby objects.

Atomix is strong enough to take out any Ultimate aliens (minus Omega) with a single punch, or kick an object up to a very high altitude. His hard body gives him substantial protection against physical attacks.

Atomix is capable of flight.

Atomix's attacks include:
 * Fissile Whistle: A flying ramming attack.
 * Nuclear Winner: A massive blast of energy that can easily knock out the enemies, as well as devastate the surrounding area.
 * Fusion Cuisine: A fusion ball, which can burn up the Ectonurites and greatly harm the Vldats. He can also make the attack continue even after he turns back into Ben. The light is shown to be very bright, as everyone present got blinded by it.

Trivia

 * In Web of Shadow, Gwen 10 as Grid Master stated that Ben 14 never used Atomix at full powers in the past because he's still learning all of Atomix's powers, including his second form.
 * That explain why he was unable to defeat Vengeance 23.
 * Atomix is the second strongest alien form in Ben's arsenal, next to Alien X.
 * Atomix is one of 4 strongest alien forms in fan fiction history; the others are Grid Master, Superwoman, Alien X and Ultimate Alien X.
 * However, Atomix's powers is nowhere near Omega Evolution nor Master Anodite's level.
 * Atomix is Ken's most favorite alien form, next to Feed Back. Unfortunately, he was upset when his father didn't add him in his Omnitrix.