Upgrade has a black exterior with green stripes that resemble circuitry all over him. The green circle on his head is his eye, which glows whenever he talks.
Upgrade wore white clothing on his front torso and the Omnitrix symbol is on his chest.
In Ultimate Alien, Upgrade has green and black stripes where the white was in the original series.
In Omniverse, Upgrade wears the Omnitrix symbol inside the ring of his eye and he is more muscular. His circuit pattern is slightly altered a bit.
Upgrade can use his internal nanotechnology to merge with or control any technology within reach by spreading over it. The size of the device is inconsequential, and he controls it as naturally as he would his own body. When he merges he upgrades the technology, hence his name. It was shown inRoad Trip Rumble that Upgrade can reconfigure technology to suit for any situation, like transform the Rust Bucket into a battle armor with an arsenal of heavy plasma weapons. Occasionally he can merge with organic life, as long as there is technology integrated within them, such as with Rojo and Rex.
Upgrade has displayed the ability to launch a powerful green plasma blast from his eye.
Upgrade has the capability to travel through electrical currents, shown in Midnight Madness. He can also phase through most any metal or technology.
Upgrade can gently descend through the air, similar to a parachute. This was demonstrated in Secrets.
Being inorganic, Upgrade is also able to survive in the vacuum of space.
Upgrade cannot possess natural creatures.
Upgrade is weak against electricity (being living metal), as shown in Tourist Trap when he was battling the Nosedeenians.
As stated by The Worst in Outbreak, Upgrade is sensitive to magnetic fields.
According to Derrick J. Wyatt, Upgrade can be affected by technorganic viruses.
Upgrade can be hurt if he is pulled long and hard enough as shown in Divided We Stand as a Mutant Squid did.
Ben 10: Omni-PowerEdit