Celebrating the imminent launch of Sonic Forces, various Sonic items have launched on Nintendo's rewards program, My Nintendo. Along with 50%-off discounts for various Sonic games on 3DS and Wii U (including the excellent 3D Sonic the Hedgehog 1 and 2), three other rewards of note are included:

The 3DS theme in particular is only available until the 16th, so grab it while you can!