Amadeus Cho is a Korean-American, born and raised in Tucson, Arizona. Amadeus Cho had been awarded the title of Mastermind Excello and the position of “7th Smartest Man in the World” (Pythagoras, by his own claim, was the 6th).
Some time after the problem the Illuminati were tackling, the incursions, were no more, Amadeus assisted Bruce Banner, the Hulk, when he got stuck with a dangerous amount of a new type of radiation that could've caused him to melt down and kill countless innocents. Using special nanites, Amadeus absorbed the Hulk's powers, becoming a gamma-powered monster and the new Hulk. Amadeus attempted to distance himself from Banner, in the sense that he tried to maintain control over his Hulk persona, and prided himself of being a better and smarter Hulk. During his tenure as the Hulk, Amadeus joined forces with many heroes, and even became part of the Champions.