REALLY EASY WAY TO UNLOCK MARTH!
To unlock Marth you must win a Melee with every starter character. There's a really easy way to unlock him by doing that!
You must have a controller assigned to Player 1. Your opponent must be assigned to slot 2. The opponent must be a Level 9 Ness and the stage must be Jungle Japes.
Spoiler:
We have more cheats and tips for this game here, Super Smash Bros. Melee cheats
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