- Unlock both Luigi and Falco.
- Complete event mode #37. After winning, Pichu will become playable.
- Complete adventure or classic mode as Mewtwo.
- Play 200 matches in versus mode.
Unlock Dr. Mario
Successfully complete classic mode with Mario without losing a life to unlock Dr. Mario. Alternately, play 100 versus mode matches. The winner of the 100th match will fight Dr. Mario. Defeat him and he will become a playable character.
Unlock Falco Lombardi
Successfully complete the 100 man melee to unlock Falco Lombardi. Alternately, play 300 versus mode matches.
Successfully complete event mode #29 (Triforce Gathering) to unlock Ganondorf. Alternately, play 600 versus mode matches.
Unlock Jigglypuff (Purin)
Successfully complete adventure mode on any difficulty setting to unlock Jigglypuff (Purin). Alternately, fight 50 multi-player battles.
Successfully complete the first stage of adventure mode with a time of xx:x2:xx. You will have to battle Luigi and defeat him in under one minute. Finish the remainder of adventure mode. At the end of adventure mode you will fight Luigi. Defeat Luigi and he will become a playable character. Alternately, playing 800 versus mode battles. After you have played 800 battles, the winner of the battle will be challenged by Luigi. Defeat him and he will become a playable character. If you lose, Luigi will challenge the winner of the next versus mode battle.
Mewtwo will appear at random at the end of a multi-player match and challenge the winner. He will be unlocked as a selectable character after he is defeated. Alternately, play 20 hours in melee vs. mode (combined number of human players times the number of hours). For example, if you play 1 human player vs. 3 CPU players, play 20 hours; 2 players vs. 2 CPU players, play 10 hours; 3 players vs. 1 CPU player, 7 hours; 4 player vs., 5 hours. To get Mewtwo easily, go into Custom Rules Melee and change "Stock" to "3" and "Item Flow" to "None", and "Stock Time Limit" to "Off". Choose two of your best characters (for fighting Mewtwo) and go into a match in the Pokemon Stadium level. Place both fighters on the Pokeball in the middle. Do not pause the game. Unplug the controllers, and leave the system on overnight to accumulate game time. Plug in the controllers again, and have one of the fighters die three times. If enough hours have been accumulated, Mewtwo will challenge you. Defeat him to unlock him as a playable character.
Unlock Mr. Game & Watch
Successfully complete classic mode with all other 24 characters or complete target test mode with all other 24 characters to unlock Mr. Game & Watch. Alternately, play over 1,000 versus mode matches.
Accomplish one of the following to unlock Pichu:
Play as Prince Marth
Play with all 14 default characters in classic mode without continuing to unlock Prince Marth. Alternately, play vs. mode more than 400 times. Alternately, play versus mode with all of the default characters. Marth will challenge the last character you played as (if you won the match). If you lose against him, then he will reappear to challenge the winner of the next versus match. Alternately, successfully complete classic mode with Ness on the very easy difficulty setting without continuing.
Play as Roy
Successfully complete the game with Prince Marth in classic mode to unlock Roy. Alternately, play over 900 versus mode matches.
Play as Young Link
Successfully complete classic mode ten times with different characters each time. One time must be with Link. Alternately, complete adventure mode with Ganondorf. Alternately, play 500 versus mode matches.
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