Quote Originally Posted by Astrocade View Post
With Nintendo it's a tie between the Famicom Disc Drive, the Virtual Boy, and the N64 CD add-on.
The FDS wasn't a failure, it sold quite well even though piracy became a problem with it. Also the N64 never had a CD add-on, your thinking of the 64DD which was a disk drive add-on like the FDS but used basically Zip disk's for software.

As for biggest failure of a console I'd say the Jaguar even though I do like the system. I think it was just too little too late for Atari at that point to make a comeback.