Monster Hunter Tri is getting a 3DS upgrade, and the 3DS is a Circle Pad peripheral.
A second Circle Pad is coming to the 3DS for the release of Monster Hunter 3G, an update to the Wii's Monster Hunter Tri, this week's Famitsu revealed.
The second Circle Pad will be an extra peripheral that will attach in a similar way as the charging cradle. It'll be placed near the face buttons, and also include L2 and R2 buttons, as well as an extra R1 button (since the system's R button can't be reached easily). Images from the report indicate that the shell will be about two centimeters in thickness, and protrude from the right side of the system roughly the same distance. No price was announced, but 01net's account reports it at around $10.
As for Monster Hunter 3G, it will be an updated version of the Wii release, featuring local wireless multiplayer, touch screen controls, and more. Monster Hunter 3G is set for a late 2011 release in Japan and should be on display at TGS.