Instructions
Play ̶0;Classic Mode̶1; or ̶0;Adventure Mode̶1; once to completion with any character to unlock Jigglypuff.
Play through ̶0;Classic Mode̶1; ten times with ten different characters. Face off against Young Link for a spot in your character selection screen.
Complete ̶0;Classic Mode̶1; with the fourteen default game character to be challenged by Marth. Defeat him to unlock him as a playable character. Complete ̶0;Classic Mode̶1; with Marth to be challenged by Roy.
Go to the ̶0;Events Mode̶1; and finish the event labeled ̶0;Legendary Pokemon.̶1; It is the 37th event and upon completion you will fight against Pichu. Defeat him to unlock him.
Finish the 28th event in ̶0;Events Mode̶1; and Ganondorf will challenge you to a battle. Defeat him and you'll unlock Link's nemesis.
Clock 20 hours in ̶0;VS. Mode̶1; to be challenged by Mewtwo. Once you defeat him, this Pokemon will be added to your roster.
Start ̶0;Adventure Mode̶1; with any character and finish any stage with a two displayed in the seconds column of the timer. For example, finish a stage with two minutes and forty-two seconds remaining. Your next battle will be against Luigi and Peach. Defeat them both to unlock Luigi.
Enter the ̶0;100-Man Melee Mode̶1; and defeat every combatant. Upon doing so, you will battle Falco from the ̶0;Star Fox̶1; games. Defeat him and he will be unlocked.
Finish ̶0;Adventure Mode̶1; or ̶0;Classic Mode̶1; with Mario and without using a continue to unlock Dr. Mario.
Complete ̶0;Classic Mode,̶1; ̶0;Adventure Mode,̶1; and ̶0;Target Test̶1; with every character both default and unlockable. This will lead to a battle with Mr. Game & Watch. Defeat him to unlock the game's final character.