If you give your Perkygothi WAY too much Speed, and turn the Lights on and off very quickly, creating a "stroboscopic" effect, then you may end up with a "Raver". Ravers are not actually a type of Tamagothi at all, but they are the horrible end result of a Perkygothi gone wrong. Fortunately, Ravers have an extremely short lifespan, because the color display, and the loud "WOOP WOOP!!" noise that they make quickly burns out the electronics of your Tamagothi, rendering it nothing more than a useless piece of plastic. Better luck next time!