There are no hidden characters. but if you find the debug menu, you can play as sandbag, master hand, giga bowser, all those characters. You've most likely seen every one of them. USE THE DEBUG MENU!!!! THIS WILL GIVE YOU COMPLETE CONTROL OF THE GAME!!!!! YAY!!!
Unlock all the characters and etc.
you can only unlock one character
Not a character.
Toad is a character from the Mario games. It is not possible to unlock him in Super Smash Bros Melee.
You unlock lucario by completing level 5 on the target smash then lucario appears
Clear 3-minute Melee with any character to unlock Crono in Super Smash Flash.
Depending on how you unlock them, possibly.
He is not a playable character. you can only unlock a trophey of him
You have to beat these secret levels
As a playable character, no.
he is not a character in this game
No.