Azure Striker Gunvolt is on discount sale in North America until December 15th. You can grab the action-platformer for $10 (down from $15) via the Nintendo eShop.
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Additionally, Ace Attorney: Dual Destinies is on sale for $15 (down from $30) until 8:59 am PST tomorrow (Tuesday).
Finally, a bunch of Atlus games have been discounted on the eShop, too, but by this point, you probably already own most of them.