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Rock Smash is a Fighting-type attack appearing in all of the Pokémon games. The move is Charizard's side special move in Super Smash Bros. Brawl, and its down special move in Super Smash Bros. for Nintendo 3DS / Wii U, its previous spot filled by Flare Blitz. Charizard pulls out a boulder and smashes it with his head, damaging any nearby opponents. The attack deals the most damage when Charizard is first hitting the rock, while the shards deal small amounts of damage. In Super Smash Bros. for Nintendo 3DS / Wii U, this move has super armor, meaning that Charizard cannot be knocked back while the move is being used.
In Super Smash Bros. for Nintendo 3DS / Wii U this move is also given two unlockable custom variants. The first is Sinking Skull, which buries the rock and decreases the power of the move but allows Charizard to bury opponents. The second is Rock Hurl, which sends out rock shards at a higher angle but does not deal as much damage.