Hold R at the title screen, press start and instead of the standard menu music, the hidden menu music from Super Smash Bros. If you get a hundred of them, your character will temporarily turn golden and have stronger attacks and flinching immunity. On the Golden Plains stage, be sure to collect as many coins as you can. In the Japanese version, you are forced to fight Master Core at on the 9.0 intensity. Note: You are forced to fight Master Core on the 8.0 intensity and higher. After defeating all forms of the Master Core, its real form can be fought. When the intensity is set between 5.1 to 5.9, Master Core will be in "Sabres", "Simulacrum", or "Source" forms. His "Scorpion" form appears when the intensity is set between 6.0 and 7.4. His "Sapien" form appears when the intensity is set to 7.5 or higher. Master Core can assume many forms, depending on the difficulty. After doing enough damage while fighting both Master Hand and Crazy Hand, Crazy Hand will leave and Master Hand will turn into Master Core. Reach the end of Classic mode, and choose the black path on the 5.1 intensity or higher. If you play on intensity 8.0 or higher, Master Core will have an additional form. In the fight against Master Hand and Crazy Hand, after dealing a certain amount of damage against either hand, the hands will disappear from battle, and Master Core will take their place. To fight the secret boss "Master Core", you must play Classic mode and reach the final boss of Classic Mode on intensity 6.0 or higher, as well as choose the black path. Keep repeating that process until you have played enough brief matches to unlock all desired characters. Then immediately fall to your doom as each match begins. If you want to unlock new characters quickly, go to Smash (offline) and set your stock to one. With some patience and constant grinding, you should be able to unlock all the custom moves for your desired character quicker than normal. Note: If you allow the roulette to roll for too long, it will eventually come to a stop automatically. Instead, repeat until the wrench icon is above the icon that is selected. If the icon selected was the wrench itself or if the wrench icon is not above the one that is selected, do not press A and resume. The wrench icon should roll down and be selected. If the wrench icon is just above the icon that is selected while you paused, hold A and resume the game. Press Home to pause the game while the roulette spins. To get them quickly, you can try to get the red wrench icon during the roulette wheel sequence in Classic mode. There are a total of 376 different custom moves, most of which are awarded randomly. Otherwise, simply repeat the process until the upcoming item is the one desired. If you pressed it just ahead of the meter's halfway point, you can press and hold A as you return to the game to receive the next item indicated. To choose your prize instead of it being random, spin the prize wheel, then press the Home button to leave the game. In Classic mode, you can play the roulette to randomly win prizes after defeating opponents.