Unlock Alternate Costumes:
Highlight a character and press any of the four C-buttons to use an alternate outfit
Unlock Captain Falcon:
In under 20 minutes beat the 1-Player game with any character on any diffculty. You will then fight Captain Falcon and if you defeat him you can play as Captain Falcon.
Using any character on any difficulty setting beat the 1-Player game and you'll then be able to fight Jigglypuff. If you defeat him you can now play as Jigglypuff.
Using ALL 8 of the original characters beat Bonus Practice 1. This can be achieved in Bonus Practice mode or in the 1-player game.
Using any character beat the 1-Player game on Normal difficulty setting using only 3 lives and without continuing. When this has been achieved you will then fight Ness and if you win you will be able to play as Ness.
Added by: Sanzano Dec 12th 2006, ID#5770