The Mushroom Sticker is a Sticker in Paper Mario: Sticker Star. It's a health sticker that recovers 20 HP. If you Perform an "Excellent" command, you can even recover 30 HP. You can purchase this Sticker in Decalburg for 15 Coins. You can also get one by saving the Green Toad in World 1-4, Hither Thither Hill, and then go to his home and talk to him. You can also get one in World 1-5, Whammino Mountain.