How do you get master hand in melee?

If you mean to play as him with a cheat code, you can't do that because SSBM doesn't work with a cheat code system. There is a glitch involving event mode and special brawl... but I can't remember it. I found it on YouTube, and even though it didn't work for me, others said it did for them. So try looking up 'play as master hand on melee' on YouTube.