Hammer is one of Kirby's Copy Ability. This have limited range, but is one of the most heaviest hitters so far. It could KO any regular opponents with one swing, but mid-bosses and regular bosses will do heavy damage.
In Super Smash. Bros series
Hammer is Kirby's side special. It is possible that it could KO an opponent within 50% damage. In a snapshot of Kirby in SSB4, the Hammer move would make a comeback. Also, King Dedede use the hammer, but in more ways than Kirby and use it as some of his special attacks, mainly that is his only weapon.
- "See Kirby#Side Special:Hammer."
Like in Super Smash Bros. Brawl, It is Kirby's side special. This move can be done in the air, too. The ways to use it is the same way in SSB3.