One way to unlock Luigi in Super Smash Flash is to clear Adventure Mode with Mario on Normal Difficulty or higher. Another way could be hacking.
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Luigi is not in the game, he already joined the game 2017
Luigi is Not in The Game. In Fact, He’s in Super Smash Flash 2 Beta!
Sorry. you can't unlcok him in super smash flash. But look somewhere if he is in one of the Super Smash Flash 2 versions and unlock him. Good luck :-)
yes
No,but you can unlock super sonic