According to a new eShop page, the "Super Smashing Sale" offers discounts of up to 33 percent on "some of the games that helped make your favorite fighters famous," as Nintendo puts it. Though the sale itself will run through October 2, the deals on offer rotate every week. This week the featured Smash Bros. characters include Mario, Bowser, Peach, Yoshi, Rosalina, Luigi and Little Mac, and the games on discount include the Wii U's Virtual Console release of Super Mario Bros. 3 (reduced from $5 to $3.49) and the 3DS' Super Mario 3D Land, which was originally $30 and is now only $20.
For a full listing of current discounts, visit the Nintendo eShop. If you can't find anything you like at the moment, the page also lists the upcoming discounts to follow throughout the remainder of September.