I heard there is a glitch in Melee that allowed you to play as Master Hand. If this is correct, how is it performed?
There are two ways to perform the glitch. One requires only one controller; the other requires two.
Method One (One controller)
This method works on all modes except Tournament, but many things freeze the game.
The player must have a controller in slot 3. Using this controller, place the cursor over the name field on the character selection screen. Now press the A and B buttons at the same time, and the player will come to the name selection. Hold the B button, but release the A button, then go down with the cursor until they are over the "name entry field". Then press the A button at the right time. The game should want to go back to the menu, because the player held the B button, but it should also want go to the name entry screen, because they pressed the A button over "name entry". If performed correctly, instead of going to either of these, the game should go to the stage selection screen (or, in Single Player, straight to the game). After selecting the stage, the player will be playing as Master Hand.
Method Two (Two controllers)
This method is much simpler, but it only works in Melee mode. To perform it, simply have two controllers, and have one be in the third controller port, and the other in any other port. Have the controller that's not player three select a character, and then hover over the back button, while the one in the third port goes to select a name, and have them hover over the new entry button. Both controllers must then hit A at the same time, as to select their option, and the stage select screen will appear (there is slight leeway between selection, but very little, less than a second). On whatever stage selected, player 3 will be Master Hand.