Confusion

Confusion is the Forward B move of Mewtwo in his Super Smash Bros. Melee appearance. Mewtwo psychokinetically whirls the opponent in front of him around and lets the opponent land clumsily on the ground, doing some minor damage in the process. This is widely considered a very impractical move for its lack of a really damaging or disrupting effect.

Confusion is able to reflect projectiles, much like the Reflector of Fox and Falco and the Cape of Mario and Dr. Mario. Unlike those moves, however, the Confusion-reflected projectile still is considered the "property" of the original character and thus is unable to harm the projectile's original owner. However, in a three- or four-way melee situation, Confusion reflected attacks will damage other fighters that didn't use the attack. It also cannot reflect Thunder Jolt, unless used at the exact moment that the attack is used.

Origins
Confusion is a weak Psychic-type move learned by many Psychic types early on. It has, like its name suggests, a chance of confusing the opponent.