Infinite Dimensional Cape
The Infinite Dimensional Cape is a technique in Super Smash Bros. Brawl wherein Meta Knight is able to exploit his Dimensional Cape to remain invisible/invincible for extended periods of time. -By repeatedly and very quickly using the upward smash attack while simultaneously holding down, Meta Knight can remain in flux for as long as the technique can be properly maintained, which can be quite difficult. He can also move to the left and right, but must remain on the ground to sustain the IDC.
The GameCube and Classic controllers are able to execute the maneuver with standard controls by using the C-stick or right analog stick for up smashes. It is also possible with the Nun chuck by converting a button into an upward smash. Unfortunately, the Wii Remote cannot be used to perform the IDC, as the upward smash attack can only be assigned to the 'up' direction, and as the technique would require pressing two opposing directions on the pad ('up' and 'down') at the same time; a hardware impossibility.
Of course, the potential effectiveness of this move is astounding for defense and offense alike, allowing evasion of literally any danger, while stealthily transporting to attack opponents. When Meta Knight exits the infinite maneuver, he will most likely attack, and may be open for punishment if not used carefully. Should Meta Knight fall off an edge while using this technique, he will become helpless and unable to grab the edge, just as he would when using a normal Dimensional Cape. Due to the stalling capabilities of this technique, and the fact that it may offer a near perfect approach, it has been recommended by the Smash Back Room that this glitch be banned in tournaments. Additionally, players would do well to refrain from using it in serious matches, as the glitch is highly unfair.
