ok so if you know something about pizza tower you'll know that to play as the noise, you need to beat the game as peppino.
but actually you can just hit peppino 100 times on the title screen and this also unlocks him.
in cheesed up, doing this will show an ominous screen of the noise staring at you that says "you've already unlocked him."
this boots you back to the title screen, but if you do it again...
the game will close after this screen shows up.