Frederick "Flash" Thompson is a minor, but recurring antagonist in the 2000's comic books series, Ultimate Spider-Man. Despite his in-keeping traits with his 616 counterpart such as being an athletic jock who bullies Peter Parker, this version of Flash is by far more sadistic, cruel, mean, taunting, and dim-witted than his mainstream counterpart. He lacks the redeeming qualities of the 616 counterpart, and takes far more pleasure in seeing Peter humiliated, and picks on him for no reason. Throughout the series, he is seen and mentioned giving Peter wedgies (only mentioned), kicking him in the anus, and overall just humiliating him.

After Peter gained his powers, Flash challenged him to a fight, resulting in his hand getting broken by Peter's super strength. When Parker joined the basketball team himself, Thompson's attitude gradually changed, as he was loyal to his teammates. Once, to prove that Peter Parker wasn't Spider-Man, he dared Kong to kick Peter. When Kong did so, Peter was able to fake tears. On about two occasions Flash came up to Peter and asked if they could talk privately. Peter coldly rejected him, thinking he would get bullied if he did so. Apparently Flash had a crush on Gwen Stacy and was trying to get Peter advice on how to ask her out. Peter learned this after Gwen's death when Flash made a sly remark about her and he later apologized sorrowfully. Silver Sable kidnapped Flash under the guidance of the Wild Pack, who believed he was Spider-Man because he came out of an alley Spider-Man had entered just moments before. When she discovered Flash was not Spider-Man, Sable tried to kill him, but Flash escaped and had his story on the news, even becoming the subject of this universe's Spider-Man movie and gaining much popularity in the school.

After Peter's death, he claims how blissfully unaware he was to his former bullying victim being Spider-Man.

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