Man, he is annoying! Do anything..."GENOCIDE CUTTER!!", repeat until you're dead. The only way that I know is to die, continue with the 1/3 enemy life option, then put K' up first. Rugal seems to have trouble with his
eins trigger->second strike. And his chain drive has a better success rate than most other supers. But it's not like I can consistently beat him or anything. The first time I fought him, I was thinking "Seriously, is this some kind of joke?"