The anticipated Hatsune Miku game for the 3DS yields some neat accessories.
http://www.nintendoworldreport.com/news/29050
Hori has announced that they will be releasing 3DS accessory kits based on Sega's upcoming 3DS music game, Hatsune Miku and Future Stars: Project Mirai.
The accessories include an exterior skin and exterior skin and a pouch. These accessories are available for pre-order through Play-Asia. Both the game and the accessories will be released on March 8, 2012 in Japan.