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), but 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, and is useful for racking up damage with difficulty in punishing it. The grounded version move is much better in Brawl, because it's as fast and has no sourspot, unlike Melee, where the sweetspot 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.
In Super Smash Bros. for Nintendo 3DS and Wii U, the Hammer Flip (鬼ごろし火炎ハンマー Oni Goroshi Kaen Hanmā, lit. "Demon Killing Flame Hammer") move was added to Kirby's Hammer move. Similar to King Dedede's Jet Hammer, Kirby is now able to hold the hammer to build power and move while doing it. However, charging it too much will start to cause damage to Kirby.
|Kirby's Special Moves|
|Side Special||—||Hammer||Hammer Flip|
|Up Special||Final Cutter|
|Final Smash||—||Cook Kirby||Ultra Sword|
One of the move's customizations is Giant Hammer, or Big Hammer in Japan (ビッグハンマー) . The move is a bigger, slower and stronger version of the Hammer, it can deal brutal damage.
|Kirby's Custom Special Moves|
|Custom 1||Custom 2|
|Standard Special||Ice Breath||Jumping Inhale|
|Side Special||Hammer Bash||Giant Hammer|
|Up Special||Wave Cutter||Upper Cutter|
|Down Special||Grounding Stone||Meteor Stone|
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 abilities. 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 Super Star, complete with fire-like aura bursting off when Kirby performs it in Brawl. Unlike in Kirby 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, though.
Usually in the Kirby games, Kirby would swing the hammer vertically when using on the ground, but when Kirby would use it in the air, he would perform 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, seem to refer at the simple controls of Hammer from Kirby's Adventure.
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 midair, using it in the same fashion as in Melee, so the attack must have been modified later in development.
- In Smash 4, it is possible to perform a glitch that causes Kirby to be enveloped in flames. To perform it, the player must fully charge the Hammer and release it while being swallowed by other Kirby or King Dedede. If done correctly, Kirby will return covered in flames. The glitch will fade out if the player dies or uses Hammer again. It is a purely aesthetically glitch and doesn't affect gameplay.