ChamAlien has a slim body that resembles a large purple lizard with darker purple camo-esque spots all over his body and has a short tail. He has three triangular eyes, the left being blue, the right red and the top green, but the red and blue eyes are the only ones that blink, while the green triangle doesn't. The top of his head is dark-purple, with a spike-shaped fin on the back of his head. He has four-fingered hands and three toes on his frog-like feet. He also has a wide mouth with sharp teeth and speaks in a high-pitched German accent.
ChamAlien can change the color of his skin to become invisible. In addition, he's also very agile, quick, flexible and slippery, making him very difficult to grab. ChamAlien can scale walls and ceilings with ease. Also, he has a long, retractable black barb that can come out of the tip of his tail. As showed in Prisoner Number 775 is Missing when The prisoner pushed a car and a truck at Humungousaur, ChamAlien also has enhanced strength and durability enough to push a car and a huge truck several yards down the street with ease. ChamAlien works well when stealth is needed.