Monstro

Origin
Monstro was a powerful, but peaceful martian who visited earth when he accidentally trapped himself in a spacecraft. Monstro created pandamonium amonst most of the earth citizens he encountered, and the police assumed him to be the vanguard of an alien invasion. Monstro tried to escape, but was tracked down by The Shield. When The Shield attacked him, mistakenly believing that Monstro was threatening his partner Dusty, Mostro crumpled into a fetal position. Monstro decided to stay on Earth for a while and The Shield attempted to look out for him during his visit.

Although he is not aggressive, Monstro demonstrated tremendous strength, speed and athleticism, likely on a superhuman level. He was highly resistant to injury, at least enough to shrug off the bullets of police firearms. He had the ability to read minds, which in turn allowed him to instantly learn English. He also had the ability to morph his appearance to look like any human (or anything else he wanted to resemble). He also had x-ray vision, allowing him to see through solid matter.