Mario Mushroom Key Ring Officially Licensed Choose your Mario Mushroom Key Ring This item is currently out of stock. If you would like to be notified when this item is back in stock, enter your email address in the box below. Email Submit £3.95 Add to wishlist About this design About this design This key ring features the iconic power-up mushroom from the Super Mario series. The mushroom is made from rubberised PVC and is attached to a metal chain.Licensed by Nintendo.