Real Name: Mac Gargan
First Appearance (as Scorpion): The Amazing Spider-Man #20 (January, 1965)
Powers: Strength, Speed, Durability, Scorpion Sense, Wears a scorpion suit with a weapon-like tail on the end
Affiliation: Dark Avengers, Sinister Six
Love Interests: None
Did You Know: Mac Gargan was once bonded with the same Alien Symbiote that bonded with Eddie Brock or Venom
A Little History
Mac Gargan was a private investigator who had been hired by J. Jonah Jameson to find out why Peter Parker was always around to take the best photos of Spider-Man. Jameson had a theory that Peter Parker was able to take good photos of Spider-Man because the two were connected. After attempting to solve the mystery and coming up empty-handed, Jameson paid Gargan to undergo an experiment. The experiment would imbue Gargan with super strength, durability, etc and allow him to battle Spider-Man on an equal level. Ironically, the experiment turned Gargan into a natural enemy of a real spider, a scorpion. Conveniently, this is what he would call himself.
With his new powers in tow, Gargan sought out to destroy Spider-Man. He even accomplished victory during their first two encounters. This, of course, thrilled Jameson. Unfortunately, because of the experiment, Gargan was actually losing grip on reality. In effect, he was losing his mind.
Realizing what was happening, Gargan sought revenge against the man who caused this pain, Jameson. Luckily, just before he could exact his revenge, Spider-Man showed up and saved the proverbial day.