Super Smash Bros.

Change Outfits
You can change your character's outfits by tapping the four C Buttons at the character select screen. Some costume changes are limited to colors, but characters like Pikachu are also available with a hat.

Classic Mushroom Kingdom
To access the hidden classic Mario stage (complete with POW signs, Piranha plants, warp tubes and elevator), beat the game's one-player mode with each of the original eight characters. It's important that you have the difficulty set to normal and stock set to three. At the end, the game will tell you that you can now access Classic Mushroom Kingdom in the versus mode.

Play as Captain Falcon
To play as Captain Falcon, simply beat the game as one of the regular characters. When Captain Falcon challenges you, defeat him and he will be a playable character.

Play as Luigi
To play as Luigi, pass the Bonus Practice 1 with at least 8 main characters. When Luigi challenges you, defeat him and he's yours.

Play as Ness
To play as Ness (from Mother 2, EarthBound), beat the game on Normal difficulty without continuing. This trick won't work if you change your number of lives. It has to be set to 3! After you have beaten the final boss, wait for the credits to finish rolling -- then fight Ness. Once you beat him, he will become available on the character selection screen.

Play as Purin
To play as Purin, unlock Captain Falcon then beat the game again with any character. After you beat the game Purin will challenge you. Defeat her and you will receive Purin.

Sound Menu
Beat Bonus Stages one and two with all 12 characters. You need to have unlocked the four secret characters first. Now go into the Data section.