Nintendo’s Club Nintendo program just started offering a Yoshi’s New Island t-shirt for 800 Coins.
The shirt shows an image of Yoshi flinging a giant egg with Baby Mario on his back and is available in small or large sizes.
Like many other Club Nintendo items, this probably won’t last very long so be sure to place your order if you have a few hundred extra coins laying around. If not, you can always get yourself a free game.