His nickname is fishy, he got really low playcounts, he registered no time ago, he plays with a touchscreen, says that now he is learning mouse and some of his replays show a non-teleporting cursor (watch Bikko replays, he plays with a touchscreen, you'll see the difference). I know that playing with a touchscreen gives you a HUGE advantage on some maps (you can't do streams and shit so well, that's why I say 'some maps'), but on some of his replays you can see a moving cursor, which means he plays with whatever you can imagine but not a touchscreen (most likely mouse and not tablet). Then we can think, what's more likely, he being a genius pro who just became like that after playing some hours (I'm saying WITH MOUSE, since his replays show that and not a touchscreen style playing, again, watch Bikko's replays) so we can say this guy plays really good with just playing 400 songs with a mouse, which looks impossible to me (please tell me who could play like that after 2 or 3 days...), maybe he plays 20hs a day offline and some online (not likely... he would've said that and I don't remember him saying this, even if he did it'd sound like a lie to me), or he is a cheater/multi. I'm going for the last one, you guys make your choice. I know mods can't work on assumptions, but sadly every case means assuming the guy is a cheater or not, you can be 99,99% sure or maybe 90% sure, you can't never ever be a 100% sure, there will always be a chance you were wrong and the guy was/wasn't a cheater and you thought the opposite, when peppy detects someone using flashlight.exe (to call that thing some way), who knows, maybe the program wasn't even activated and the guy didn't cheat, it's not likely at all but still a possibility, yet you assume he was cheating since that's more likely than the other rare case, this is almost the same. I'd be happy to see him playing live, this guy should be requested a video long time ago, where we can see his hands and screen.
This guy who got that crazy score at Made of Fire may be legit too, you can always think about some excuse, I know this case is ridiculous but you could think this guy is just an uber pro player who played online for 3 years and he got godlike skills/memory, it's possible but absolutely not likely, same as the touchscreen-guy case (though one's more obvious than the another).