At its 3DS showcase in Tokyo last night, Nintendo revealed a date and price for its upcoming circle pad attachment, which caused a stir when it was revealed last week.

The peripheral will retail for 1500 Yen (£12.30) and will launch December 10 in Japan.

In addition to Monster Hunter Tri G, Nintendo revealed several other games that will take advantage of the attachment: Resident Evil: Revelations (due early 2012), Metal Gear Solid Snake Eater 3D (winter), Ace Combat 3D Cross Rumble (winter), Dynasty Warriors Vs (2012) and Kingdom Hearts 3D.

Games that support the device will display an icon showing the attachment.

Whilst many people assumed the device would draw its power from the 3DS itself, it's since been revealed that the second circle pad will require one AAA battery to work.

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