When using Rock Smash, Charizard takes a large rock and headbutts it, shattering it into many pieces in the process.
The force of the headbutt deals high knockback and 18% damage, and after this portion of the attack, the rock shatters into three smaller pieces that fly forward in a spread effect, dealing 5% damage each. The fragments can be reflected. If the headbutt and all rock fragments hit, it will deal a massive 33% in damage, though this can only occur in normal matches when Rock Smash is landed point blank on a low-damage opponent. However, against bosses, Rock Smash is an extremely effective move, as their massive size and inability to flinch ensures they will always get hit by all the rock fragments when hit with Rock Smash; this is so effective that Charizard can defeat all bosses faster than any other character in Brawl, and holds the world record time in Boss Battles. Rock Smash's massive damage potential also means it is one of the few moves that can break a full health Smash Ball in one hit.
Due to Charizard becoming part of the Pokémon Trainer's team again in Ultimate, Pokémon Change replaced Rock Smash as its down special move.
Special Move customization was added in Super Smash Bros. 4. These are the variations:
Rock Smash, introduced in Generation II, is a physical Fighting-type attack in the Pokémon games. It has alternated between TM and HM status over time. In battle, it is a generally weak move with a 50% chance of lowering the target's defense; it can also be used to destroy rocks outside of battle, making it essential in completing many Pokémon games by clearing obstacles to the player's progression.
Charizard can learn Rock Smash by TM or HM in all games since the move's introduction.