My favorite Super Street Fighter IV 3D Edition feature that I’ll never use? Totally the figurine mode. I anticipate pouring Play Coins into the game and hunting down every code I can get to amass a giant army of figurines… which I’ll never trade or bring out for StreetPass battles due to hermitude.
NeoGAFfer wackojackosnose has compiled a list of passwords that can be redeemed for unusual, leveled-up figures including gold and silver versions of the characters. Some of them apparently come from Japanese retail promotions — and the gold Chun-Li comes from the video stream of Capcom’s Nintendo World 2011 presentation.
See also: More on Super Street Fighter IV 3D Edition