Mallet
Mallets (トンカチ Tonkachi), also called Hammers, are consumable items that can be used to inflict grievous damage upon foes (equal to level 5 strength, regardless of Pit's own), or free Centurions from their stony prison. Pit can equip and use mallets at any time, provided he's got at least one in stock, and it won't break until it impacts a foe or Centurion. The Harp can be used to turn enemies into mallets, and they're also commonly purchasable in Stores.
Appearances
Kid Icarus
A mallet can be purchased for 20 Hearts. An intimidated merchant sells them for 10, and angered one will raise the price to 50. The Mallet can only be equipped in a Fortress.
Kid Icarus: Of Myths and Monsters
Hammers are sold for 20 Hearts here unless Pit is buying from a merchant in a Fortress, where they cost 50 instead.
Kid Icarus: Uprising
Although the Mallet itself does not appear in Kid Icarus: Uprising, the Arm functions as a hammer-like weapon with a long-range attack.