The Hammer is Kirby's Smash B move, introduced in Super Smash Bros. Melee (as were most Smash B moves). Kirby swings the hammer he gains from his Hammer ability in the Kirby series. On the ground, he swings it horizontally (as opposed to in the games, where he swings it vertically over his head to the ground in front of him), however, in mid-air, he swings it vertically, more like in the games. This is altered in Super Smash Bros. Brawl; while being used in the air, he swings the same way. The grounded version move is much better in Brawl, because it's as fast and has no sourspot, unlike Melee, which was tiny and the sourspot was very weak and punishable. When the move hits an enemy, it gives very high knockback, making it a good finisher, and one of Kirby's best KO moves in Brawl.
While being used in mid-air, Kirby spins twice instead of once, and the hammer appears to be set aflame, akin to one of Kirby's attacks as Hammer Kirby. He also gains horizontal distance using Hammer. Of the two mid-air swings, the first does mainly vertical knockback and the second has great horizontal knockback. This is particularly useful against bosses like Ridley, as it can stall his fall time, allowing him to use Double Hammer again for a total of four hits. This is capable of taking out up to a third of Master Hand's HP.
In the E3 2006 movie of Brawl, Kirby was seen using the Hammer move in mid-air, using it in the same fashion as in Melee, so the attack must have been modified later in development.
Hammer is one of Kirby's many copied abilities from his various adventures. Kirby acguired this ability almost always from a gorilla-like miniboss called Bonkers. It is often one of the most powerful ones. The hammer is almost identical in appearance to King Dedede's.
- The attack Kirby's using with the Hammer is based on Hammer Flip from Kirby Superstar , complete with fire-like aura bursting off when Kirby performs it in Brawl. Unlike in Super Star, Kirby doesn't swing it upwards, instead he swings swings the hammer horizontally on front.
- The Double Hammer could be based on Hammer Swing from Kirby Super Star. Kirby wasn't able to use this move in the air in his games.
-Usually in Kirby-games, Kirby would swing the hammer vertically when using on the ground, but when Kirby would use it in the air, he would perfom Giant Swing. This makes Kirby spin while holding the hammer out and twirling it around his body. In Melee, when Kirby uses the Hammer in the air, he would perform a weaker but quicker Ultra Giant Swing from Kirby Super Star. This along with Hammer Flip seems to refer at the simple controls of Hammer from Kirby's Adventure.
|Kirby's Special Moves|
|Side Special||—||Hammer||Hammer Flip|
|Up Special||Final Cutter|
|Final Smash||—||Cook Kirby||Ultra Sword|