Smash-less - 5000; Do not use any smash attacks. (Quick tap of the Ctrl Stick + A.)
Fighter Stance - 100; Press L Button when opponent is defeated.
Acid Clear = 1500; In Samus's stage, let the acid knock your opponent of the arena.
Full Power = 9000; Have full power when opponent is knocked-off the arena.
Cheap Shot = -99; Hit opponent while he's trying to get back in the arena, hit opponent when down, hit oppenent hanging on the edge, ect.
Very Hard Clear - 350,000; Beat the game on Very Hard Difficulty.
Hard Clear - 280,000; Beat the game on Hard Difficulty.
Normal Clear - 210,000; Beat the game on Normal Difficulty.
Easy Clear - 140,000; Beat the game on Easy Difficulty.
Very Easy Clear - 70,000; Beat the game on Very Easy Difficulty.
Throw Down - 2000; Knock opponent of the arena by throwing him.
Good Friend - 8000; In a stage in which you have an ally, keep him alive intil the end of the battle.
Perfect - 30,000; Hit all the targets or board all the platforms in a bonus stage.
No Item - 1000; Do not use any items during battle.
ARWING Clear - 4000; In Fox's stage, let an ARWING knock-off your opponent with its balsters.
Pokemon Finish - 11,000; Let a Pokemon knock your opponent off the arena.
Special Move - 5000; Knock opponent of the arena with a special move. (B, Up + B or Down + B)
Tornado Clear - 3000; In Link's stage, let one of the tornados knock your opponent off the arena.
No Damge - 15,000; Never getting hit during a battle. You will also get the Full Power award.
No Miss x # - 5000x#; Never getting knocked off the arena in any battle. # is the number of battles you accomplish this with.
Sheild Breaker - 8000; Break the opponent's shield. If you hit a shield repeatedly, it will eventually break.
Speed Demon - 80,000; Get Speedster awards in every stage.
No Miss Clear - 70,000; Get the No Miss award in every stage (No Miss x 11).
Comet Mystic - 10,000; Both players get knocked-off into the background, but you still win because you have an extra life.
Mystic - 7000; Both players get knocked-off and hit the bottom of the arena, but you still when because you have an extra life.
Bumper Clear - 10,000; A bumper knocks the opponent off the arena.
Single Move - 8000; Only use one move to knock-off opponent. You can use this move multiple times, but you may only use that one move.
Booby Trap - 12,000; A motion mine knocks the opponent off the arena.
Item Strike - 20,000; Knock the opponent off the arena by throwing an item at him.
Pacifist - 60,000; Never using any moves to hit the opponent. Most easily done on Pikachu's stage. (A pacifist is someone who dislikes violence.)
True Friend - 25,000; In the Mario Bros. stage, keep both your allies alive and knock-off both opponents yourself. (?)
Speedster - 10,000; Knock-off opponent in under 30 seconds. (?)
DK Defender - 10,000; Keep both of your allies alive after knocking Giant DK off the arena. (?)
Heavy Damage - 28,000; Knocked-off the opponent when you had over 100(?) damage.
Speed King - 40,000; Get Speedster awards for half the stages. (?)
Vegetarian - 9000; Pick up 3? Maximum Tomatos.
Jackpot - 3330; ???
Lucky 3 - 9990; ???
Star Finish - 10,000; Have the hammer or star when you win ???
Shooter - 12,000; ???
Hawk - 18,000; ???
Kirby Ranks - 25,000; ???
Play
as Green and Orange Mario
You know about the alternate costumes, right? Well, here's one some people might not have found. First, start a new team multiplayer match. Now, change player one's team to green by pressing the "RED" button twice, (the "RED" button in the red box where the 1P hand is when you start.) Player 1 must now select Mario. When he is selected, he will be wearing a green top and orange overalls. You can also do this trick for Donkey Kong and Kirby.
Rotate
Characters in Bio Screen
Go to the Bio Screen, pick a character and rotate the joystick while holding Z.
In Team Node under VS mode you can borrow a life from your partner by pressing START if you lose a life.
While at the character selection screen press C-Left, C-Right, C-Up, or C-Down.
In Vs Mode choose 3 computer players and pick your character to play. Play the STOCK mode and set lives to 10. Set the computer handicaps to 5. Win and go to the spoils. Then go to options under Vs and pick the Item switch. You can pick how often items show up! Lots of Hammers, Bombs you pick!
Finish the game with 9 characters (including secret ones) on Bonus level 1 and 2. You can do his during Bonus 1 & 2 practice.
You can unlock the musical Pokémon by completing the one player game on any difficulty with any character. Jigglypuff is armed with 2 slumber inducing attacks. They are the Sing and Sleep. You can do the Sing by pressing B+UP at the same time. You can do the Sleep by pressing B+DOWN at the same time.
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.
Access
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 character. At the end, the game will tell you that you can now access Classic Mushroom Kingdom in the versus mode.
To play as Luigi, pass the Bonus Practice 1 for at least 8 main characters and Luigi will challenge you. Defeat him and he's yours.
To play as Captain Falcon, simply beat the game as one of the regular characters in under 20 minutes. When Captainchallenges you, defeat him and he will be a playable character.