Edgar Wright: The Definitive Guide To Homages, Influences And References
Scott and Matthews fight is done in the Hong Kong martial arts style, where both combatants are dusted as to exaggerate their movements and the drama. The dust is nicknamed Power Fun by those in the industry. Its also exaggerated by digital trails often seen in classic fighting games, starting with Wallace's shouting of "Fight!" to kick the battle off - before he continues Wright's numerical quirk by saying "look out, it's that one guy" (Patel's army insignia on his jacket also confirms him as a Private First Class.) This first ex battle establishes several fight game features, such as the VS logo that appears, plus the hit-combo count, and the appearance of health bars (though not until the final battle.) The biggest video fight game references come in the shape of Scott's Dragon Punch, which is taken straight out of from Street Fighter and the stylised K.O. that appears on his defeat... 
The kiss in the Ramona-Matthew cartoon is actually the boot-up sound of a Mac. Similarly, the heart breaking in Todd and Ramonas sequence is the Mac trash noise. This noise comes back when Scott closes his eyes after Ramona dumps him at the after-party club. Finally, when Kim raises her eyebrow during the second run at the Chaos Theatre, it makes a Mac error noise. The sequences themselves use artwork from OMalleys volume one, but its actually animated by Wrights brother Oscar and design studio VooDoo Dog. Oscar also designed the Katanayanagi Twins twin snow dragons that fight Sex Bob-ombs green-eyed Yeti for the final of the Battle of the Bands and, with help from Paul Robertson, the 1-up icon. 
Whenever one the evil exes is killed, they explode into a shower of coins with a score befitting their number in the pecking order. Patel explodes into a 1000 score, with his inspired by legendary comic book artist Jack Kirby and his Kirby Crackle the dot-filled explosions that became his signature.