Leaf (Paper Mario: Sticker Star)
From the Super Mario Wiki
The Leaf sticker in Paper Mario: Sticker Star bears a striking resemblance to the Super Leaves of Super Mario Bros. 3, although they are colored green and serve a much different effect. In this game, rather than giving Mario a Tanooki tail to attack enemies with (this function is served by the Tail sticker), this sticker automatically makes all attacks used in the same turn Excellent and all blocks successful especially Spinies and Scaredy Rats when they attack due to them throwing off the players timing. Leaves also have a very high value when sold in shops; the Shiny Leaf sticker is the second most valuable sticker in the game, only surpassed by the Megaflash Clone Jump. Leaves and Shiny Leaves are found in Strike Lake and Rumble Volcano, respectively.