The Silver Mario amiibo has been found in the systems of Toys R Us, Best Buy, and the release date is May 29th. Splatoon, the Splatoon series of amiibo, and the 4th wave of Super Smash Bros. amiibo will be released on May 29 as well. Because Silver Mario has been found in the systems of more than one retailer, Silver Mario probably will not be exclusive to a certain store.