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Pound is Jigglypuff's neutral special move in Super Smash Bros., becoming its side special move in Super Smash Bros. Melee onward, having been replaced with Rollout, based upon the Normal-type move in the Pokémon series.
When used, Jigglypuff steps forward and slaps opponents. In Super Smash Bros. the attack sends them diagonally into the air if it hits. In Super Smash Bros. Melee, the attack knocks back vertically when used up close, and horizontally when hit from farther away, while in Super Smash Bros. Brawl this is reversed. Finally, in Super Smash Bros. for Nintendo 3DS / Wii U, the move knocks opponents directly up, no matter where it hits. If Pound is used in the air, Jigglypuff is sent forward as it slaps, which helps with its horizontal recovery.
In Super Smash Bros. for Nintendo 3DS / Wii U, Jigglypuff has two unlockable variants for this move:
The first is Sideways Pound, which knocks opponents horizontally, similar to the original Super Smash Bros., but it also deals less damage, and cancels all of Jigglypuff's momentum.
The second variant is Pound Blitz, which sends Jigglypuff sliding across the ground a further distance, and deals multiple hits while going through opponents.