Invisible Melee
From SmashWiki, the Super Smash Bros. wiki
Invisible Melee is a Special Melee option in SSBM, and a Special Brawl option (under the name of "Clear") in SSBB. In both games, it makes all players permanently invisible, similar to the effects of the Cloaking Device. However, the players can still be damaged, and do not gain bonus points based on invisibility, such as Invisible KO. Obtaining a Cloaking Device will temporarily activate all of the effects, such as invulnerability.
Invisible Mode in Melee still showed an outline of the person at time, but in Brawl it does not do so. It is a very hard mode to master V.S. computer players (as the AI knows where you are at all times). Characters like Lucario and Samus can be easily spotted in this mode while charging their attacks (Aura Sphere and Charge Shot, respectively).
