How do you beat Super Smash Bros melee

The game doesn't really have a storyline or plot to beat. However, there are numerous features that can be unlocked, like trophies, extra game modes, and even hidden characters.

All the hidden characters can be unlocked by playing Multi-Player battles long enough (or by leaving the GameCube power on for close to 24 hours and then playing a Multi-Player battle), although some will show up after specific challenges. However the character is unlocked, after completing the task, the character's silhouette will appear and you will be forced to defeat the new character to unlock it. If you cannot beat it, you will be forced to play another Multi-Player battle to bring the character back and defeat it. If unlocked by some other method, completing that method again will bring the challenger back.

After all hidden characters are unlocked, All-Star mode will be available in Single Player mode.

Completing all the Single Player modes with all characters will unlock all the character trophies, essential to completing the trophy collection. Getting certain distances in the Home-Run Contest and certain times in the Break the Targets stage will unlock other trophies. There are also various miscellaneous trophies acquired through some very random methods, like having save data from other GameCube games on the memory card with the Melee save.

As the characters are filled out, all the hidden stages will unlock. The special stages will be unlocked upon the completion of the Event Mode challenges.

Trophies will also appear randomly through the different stages in Adventure Mode, as well as in the Collect the Trophies stage in Classic Mode.

As certain features are unlocked, there will be a cumulative list of accomplishments detailing everything you've unlocked to that point.

Once everything is unlocked, you've essentially beaten the game. It's still great for beating up on your friends' avatars, though.