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.
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 and Terry 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.
List of reverse attacks