Ghost Arrow glitch
To do it, perform Chain dance (catch a boomerang while chained to a wall) and start charging an arrow. If you keep charging and scale up the wall, the next time you start charging an arrow, no arrow will spawn - This is known as "Ghost Arrow".
It is possible for other objects in the game to fill the empty object slot prior to or while shooting the "Ghost Arrow", thereby enabling Link to shoot something else. Any item (including Octorok, Goomba, etc.) and many character projectiles will work.
Depending what you're doing, using Ghost Arrow glitch has a high chance of crashing the game. This may happen for example, if you use a projectile that will not work, such as Ness' Yoyo, or when Link touches a Mushroom, gets attacked or falls into the void while charging Ghost Arrow.
The glitch will also occasionally corrupt the textures, which persists even after the match is over - this is known as "Ghost Melee".
This will not work in the 1.2 and PAL versions of the game, because Link will not catch his boomerang while using grapple, making Chain dance impossible.