Xbox and Gamecube both have their share of different accessories. The Dreamcast have many accessories. But the one accessory that really made my eyebrows jump up in the air when I first heard about it - is the Trance Vibrator.
The Trance Vibrator was sold in a special edition of the rythm based railshooter Rez. It came with an USB cable to be plugged into the console and a washable pouch to keep it in. Yes, washable. When running the game - the vibrator... vibrates. Apparantly a lot, I have not had the delightful chance to try it out but from what I hear it is much stronger than the built in rumble feature in the Dual Shock 2 controllers.
Since the release of this... interesting, to say the least, accessory it has been the subject of reversed engineering and is now also sold as a general PC peripheral for those long hot nights of playing Minesweeper.
So now you do not have to answer something conventional like "the Samba de Amigo maracas!" when asked about your favorite accessory, now you can shout "the Trance Vibrator!" from the top of your lungs.
