Atomix

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

Atomix has a humanoid robotic appearance that is taller than Negative Ultimate Humungousaur. 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.
 * -| Appearance=

Atomix wears the Omnitrix symbol on his green and white belt. 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. The way he creates the blasts is by chanting "HAA-MEE-NA HAA-MEE-NA HAA-MEE-NA-HA!" It is not crucial for Atomix to chant every attack, but doing so will focus an attack's power and cause substantially more damage.
 * -| Powers=

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 Negative Ultimate Humungousaur 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 known attacks include: Atomix is boundlessly overconfident and can cause a total meltdown.
 * Fissile Whistle: A flying ramming attack.
 * Nuclear Winner: A massive blast of energy that can easily knock out Negative Ultimate Spidermonkey and other enemies, as well as devastate the surrounding area.
 * Fusion Cuisine: A fusion ball, which can burn up Zs'Skayr and greatly harm Lord Transyl. 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 in The Vampire Strikes Back.
 * -| Weaknesses=

Atomix can get tired after using up most of his energy, as seen in Malgax Attacks.

It has been theorized that, since Atomix has never displayed the ability to absorb energy, NRG  could easily take him down, if out of his containment suit, by absorbing the attacks thrown by Atomix.
 * -| Theories=
 * Atomix was first theorized about in  NRG is More Powerful than Atomix  where it was theorized through in-show evidence that NRG  would actually be one to dominate Atomix.
 * Atomix will appear in Who is Truly Ben's Most Powerful Alien?.
 * Atomix will appear in Mechanical Aliens.
 * -| Appearances=
 *  NRG is More Powerful than Atomix  (debut)
 * Who is Truly Ben's Most Powerful Alien?
 * Mechanical Aliens
 * -| Trivia=
 * He, alongside NRG, is the first/second alien to have a theory.