In EVO 2008, CPU defeated Melee world champion Ken Hoang in the finals set, making him the winner of one of the first notable Brawl tournaments. He was not yet fifteen years old. The victory, however, was immediately controversial. CPU, who was effectively unknown prior to the tournament, was perceived as having less skill than Ken, a veteran who had won hundreds of tournaments in the past; in addition, CPU's victories in the tournament were primarily ascribed to the fact that items, including the Smash Ball, were allowed during the tournament, and that CPU had become luckier with them; in addition to frequently using R.O.B.'s Diffusion Beam, a particularly notable moment in his battle with Ken featured CPU KOing the veteran with a Bumper at only 50% damage. As a result of this reliance, multiple observers and competitors claimed that other R.O.B. users in the tournament held superior skill to CPU, and that CPU did not deserve to even make it to the finals in the first place. CPU himself later stated that he was aware that he had become luckier than Ken with items, and he acknowledged that without the items, he would have been easily defeated by Ken, only furthering criticism of the tournament itself.
At the conclusion of the tournament, CPU stated that attending further tournaments was unlikely; at the age of fourteen, he was entirely dependent on his parents for transportation, and that the sole reason for attending EVO was because of a family vacation that took place in Las Vegas at the same time as the tournament.
Following his controversial victory, CPU briefly continued his Brawl career. He reappeared at EVO 2009, tying for twenty-fifth with eight other players in a singles pool of 128 entrants, and ninth out of twenty-sixth in the doubles bracket. His last tournament was a low-key affair in December 19th, 2009, where he won second in a pool of eight in the doubles bracket. As of 2017, he occasionally enters events for Super Smash Bros. for Wii U.