Phred's Cool Punch-Out 2 Turbo is a romhack of Punch-Out!! with tweaked mechanics, new gimmicks, and a couple of new characters. Characters you get to fight include Zelda, Disco Kid from Punch-Out!! for the Wii, and even Doc Louis himself.
DJ Incendration goes through the entire game, one-shotting certain characters if possible, and finishes it in record time.