Powers: Serpentino displayed no special skills or abilities, save his mighty skills at tying up butlers and making shapes with the Magic Snake puzzle. I think he was supposed to have snake-like agility or something.
Bio: The Hulk rescued Donny and Dotty, the world’s richest twins, from being lost in the woods. They explained they were searching for their lost puppy Scrapper. Being the nice, friendly sort of gamma-irradiated monster, Hulk offered to the find the dog for them.
While the Hulk lumbered off to retrieve the puppy, Serpentino (that creepy crook) broke into Donny and Dotty’s house and tied up their butler. Kidnapping the twins, he demanded that they come with him and not bring anything to slow them down. Thinking quickly, Donny handed Serpentino his Magic Snake puzzle. Fascinated by the puzzle ("Hmm...you can make one interesting shape after another!") Serpentino decided to delay his getaway until he had figured out the puzzle. Suddenly, the Hulk returned with Scrapper and fixed Serpentino’s proverbial hash. Serpentino was taken to jail and everybody learnt an important lesson. The End.
(New Avengers Most Wanted Files - BTS) - Serpentino was reported as having remained in prison since his initial capture.