Here is all the characters you can get in super smash bros. To get Luigi you have to beat practice 1 with all of the 8 intial characters. The way you can beat Jiggleypuff is by beating the game regular any difficulty. The way to get Captain Falcon you have to beat the game under 20 minutes any difficulty(including bonus stages). Ness can be achieved by beating the game with 3 lives on normal difficulty and no continues(quite a challenge). To get the special secret character I believe the name is Pruin or the girl Jiggleypuff you have to beat the game with Captain Falcon any difficulty level. The secret bonus stage can be reached by you have to beat the game with all the characters.