The Shiny Hammer is a Battle Sticker featured in Paper Mario: Sticker Star. It is the fourth strongest regular Hammer sticker that can be used. Shiny Hammers are pretty rare early in the game but become common once Mario gets to World 4.
Shiny Hammer stickers are similar to Hammer stickers except they have a silver background. It has a two - star attack power. They do fairly strong damage to low altitude or ground enemies, and only take up one regular Sticker in the Sticker Album. Shiny Hammer stickers can be sold for 5 coins, and purchased for 10.
A stronger Hammer attack. It will build power as you hold your windup, but don't overdo it or the head will pop off!