Reverse is an attack effect in the Super Smash Bros. series that debuted in Super Smash Bros. Melee and has appeared in every subsequent game. A fighter hit by a reverse attack is forcibly turned around to face the opposite direction instead of flinching.
A fighter flipped by a reverse attack turns away from the screen and assumes a mirrored stance, showing their backside, the reverse effect is the only way to see this pose. If the opponet is performing an action whil being reversed, they continue the animation as if nothing happened, putting them at a positional disadvantage due to facing the opposite direction and having to wait until the animation can be interrupted.
While hitboxes with the reverse effect generally do not cause knockback, there are situations where they can boost the momentum of an airborne character. Reverse attacks typically also reflect projectiles, but this is solely a design convention and is not a property of the reverse effect.
In Super Smash Bros. Ultimate, Ryu, Ken, Terry, and Kazuya always face their opponent in 1v1 matches, but if one of them is hit by an attack with the reverse effect in a 1v1 match, he immediately turns back to face his opponent again. Min Min cannot be reversed when charging her forward smash.
List of reverse attacks