change character color:

At character select screen press A on your character then press X or Y to change their color!.
Sent in by: Mr. Monkey Man

How to unlock Diddy Kong:

Use Donkey Kong and beat 30 polygons in cruel melee mode and then he will fight you at the end.
sent in by: Lenny

Alternate Multiplayer Music:
After unlocking the Sound Test (portions of this trick can be done before unlocking the Sound Test, however), you can change the music that plays on some of the stages. When selecting them, hold L or R until the stage loads. Each human player competing in the match must also hold L or R. The stage's music will change. This trick works on the following stages:
- Infinite Glacier: Icicle Mountain (Retro theme from Balloon Fight for NES)
- Termina: Great Bay (The theme of Lost Woods from Legend of Zelda: Ocarina of Time for N64)
- Hyrule: Temple (A remix of various themes from Fire Emblem titles)
- Yoshi's Island: Yoshi's Island (Stage 1-1 and world 1 map remix from Super Mario Bros. 3 for NES)
- Kanto: Pokémon Stadium (The Trainer Battle theme from Pokémon Gold & Silver for GBC)
- F-Zero Grand Prix: Big Blue (A theme from Mach Rider for NES)
- Eagle Land: Onett (The theme of EarthBound)
- Mushroom Kingdom OR Mushroom Kingdom II (The Fever theme from Dr. Mario)
- Special Stages: Battlefield (The theme used in Multi-Man Melee fights)
- Special Stages: Final Destination (The theme used in Event 51, The Showdown)

Sometimes, the music will change automatically (12% chance).

Always Get Desired Pokemon:
Go to training mode and continuously select 'pokeball' from the menu. Whilst throwing them, look out for your favourite pokemon to appear, and STOP on that one. After it has done its move, go to 1-p adventure or classic mode, and the first pokeball you open will be the one preveously found on training. After this, the rest of the pokeballs you open are random. A good trick to use in this way is to do it with mew, because you get bonus points for seeing her.

Capt. Olimar trophy:
If you start up SSBM with a Pikmin save on your memory card you will get a free trophy.

Character Unlock: Dr. Mario:
To unlock Dr. Mario, you must complete 1-P Classic Mode using Mario at any difficulty/stock and without continuing.

Character Unlock: Falco:
To unlock Falco, you must complete the 100-Man Melee mode. Defeat Falco after you complete that, and you can play as him.

Character Unlock: Ganondorf:
To unlock the evil Ganondorf, complete Event 29. You will then be challenged by Ganondorf; defeat him and you can play as him from then on.

Character Unlock: Jigglypuff:
To unlock Jigglypuff, simply complete the game in 1-P Mode at any difficulty/stock (Adventure or Classic).

Character Unlock: Luigi:
To unlock Luigi, in Adventure Mode, complete the stage with a 2 in the seconds meter (03:12 for example). You'll then view a scene where Luigi comes and kicks Mario away so he can fight you with Peach. Defeat them both, then go on and complete Adventure Mode. You'll have to fight Luigi; defeat him and you can play as him.

Character Unlock: Marth:
To unlock Marth, complete Classic mode with all 14 regular characters (not ones you've unlocked). Marth will then challenge you; beat him to gain him as a selectable character.

Alternatively, you can simply use every character as a human player in VS. Mode, and get a challenge from Marth that way.

Character Unlock: Mewtwo:
To unlock Mewtwo, play in VS. Mode for either 20 hours (Combined VS. Play Time total), or play 700 matches in that mode. After either requirement is met, Mewtwo will challenge you; defeat him and you can play as Mewtwo!

Character Unlock: Mr. Game & Watch:
To unlock Mr. Game & Watch, you must complete both Classic and Adventure 1-P mode or the Target Test with ALL characters at any difficulty/stock, regular and hidden (that includes Mewtwo). After you do that, you'll be challenged; win this battle and you can play as Mr. Game & Watch! Alternately, play Vs. Mode more than 1000 times.

Character Unlock: Pichu:
To unlock Pichu, complete Event 37 (Legendary Pokémon). Pichu will challenge you; win and you'll be able to play as Pichu!

Character Unlock: Roy:
To unlock Roy, also from the Fire Emblem series, complete Adventure Mode using Marth at any difficulty/stock. Roy will challenge you; defeat him and you can play as him.

Character Unlock: Young Link:
To unlock Young Link, complete Classic mode with 10 different characters at any difficulty/stock (2 of those characters must be Link and Zelda). You'll then be challenged by Young Link; defeat him to be able to play as him in the game!

Choose your Victory Pose in Melee Mode:
As soon as the match ends in multiplayer matches, hold X or Y (or A and B for characters with more than two victory poses) and you can select which victory pose your character performs, that is if your character won the match.

Crazy Hand and his Trophy:
If you can manage to complete Classic Mode in less than 15 minutes without continuing on Normal or higher, you will battle both the Master Hand and Crazy Hand at the end. To get the Crazy Hand trophy, complete Adventure Mode on Hard or Very Hard difficulty without continuing.
PRIMA Strategy Guide

Different Music for Break the Targets:
When you're practicing the Target bonus round, hold, L or R while choosing the character, and loading to change the music. If you retry, hold L or R again.

Different Music in Adventure mode:
When you are on the screen which it shows the stage you are going to, press and hold L R and START at the same time and release once the music starts.

Different Trophy Backrounds:
While viewing a trophy in the close up mode, press start to cycle through backrounds. This shows the GC's lighting effect cpabilities.

Face Giga Bowser in Adventure Mode:
Play Adventure Mode with any character on Normal difficulty or higher, and get to Bowser without continuing. If you beat Bowser without continuation, his trophy will come back from the dead and transform into Giga Bowser. If you manage to defeat him again without continuing, you will get the Giga Bowser trophy.

Fast-foward through the credits:
While looking at the credits or playing that shooting game whatever, press start to fast-foward through the credits. To stop, press start again.

Fox and Falco's Secret Taunts:
Fox and Falco each have secret taunts that can only be performed on their respective stages (Corneria or Venom). It can be done only once per match. As either Fox or Falco, press Left and Right on the Control Pad repeatadily making sure not to hit the center of the Control Pad as well as up or down. If done correctly, Fox/Falco will shake for a few moments. Then, the StarFox crew will say some humorous lines and the taunt is over. Its merely for entertainment means. You can list to the StarFox crew's sayings through the Sound Test.

Hidden Pokémon: Mew and Celebi:
There are two Pokémon that appear in the Poké Balls but are extremely rare. Neither one attack but you can get special bonuses/trophies from seeing them. To get Mew to appear, you must first unlock all 11 secret characters. To get Celebi to appear, you must unlock every single thing in the game (except for trophies). After these needs are met, Mew and Celebi will both have a 1/251 chance of appearing in your Poké Balls.
PRIMA Strategy Guide

Hidden Trophies:
Some trophies are hidden and can't be won through the Lottery/Snag Trophy mini-game/etc. Here is the complete list of trophies and how to get them:

Character Trophies (You get three trophies per playable character; one for completing each 1-P Regular Match mode (Classic, Adventure, All-Star))
Male Wire Frame (Complete 100-Man Melee within 240 seconds)
Female Wire Frame (Get 100+ KOs in Endless Melee)
Fighting Wire Frames (Complete 15-Minute Melee)
Giga Bowser (Defeat Giga Bowser in Adventure Mode without continuing)
Master Hand (Complete Classic on Hard or higher without continuing)
Crazy Hand (Complete Adventure on Hard or higher without continuing)
Food (Play 1,000 VS matches)
Maxim Tomato (Play 10 VS matches)
Heart Container (Play 100 VS matches)
Lip's Stick (Perform a 20+ combo in Training)
Motion-Sensor Bomb (Complete Event 3)
Metal Box (Perform a 10+ combo in Training)
Bunny Hood (Perform 125+ combos with all characters combined in Training)
Smash Coins (Play 100 Coin Battle matches)
Mew (Complete All-Star on Hard or higher)
Sudowoodo (Play 200 VS matches)
Unown (Set a combined Home-Run Contest record of 16,404 ft (5,000 meters))
Entei (Complete Event 26)
Celebi (See Celebi in your Poké Ball)
Lon Lon Milk (Combined clear time in Target Test is less than 26 minutes)
Kirby Hat 4 (Play 100 Coin Battle matches)
Kirby Hat 5 (Unlock all 11 secret characters)
Falcon Flyer (Play 150 VS matches)
F-Zero Racers (Complete Adventure mode with all 25 characters)
Mute City (Total distance walked by characters is over 10,000 meters)
Kraid (Play 50 VS matches)
UFO (Play 100 VS matches)
Game & Watch (Complete Event 45)
Target (Clear Target Test with all 25 characters)
Sandbag (Set a record of over 984 ft in Home-Run Contest)
Battlefield (Clear All-Star)
Final Destination (Complete Event 51)
Goomba (Complete Event 14)
Paper Mario (Set a record of 1,476 ft in Home-Run Contest)
Wario (Clear All-Star without continuing)
Marin (Unlock the Sound Test)
Majora's Mask (Complete Event 47)
Landmaster Tank (All characters' KOs total more than 1000)
Wolfen (Clear Adventure in less than 18 minutes)
Meowth (Complete All-Star with all 25 characters)
Tom Nook (Collect over 1,000 Coins (spent coins don't subtract))
Mr. Resetti (KO more than 5 opponents in Cruel Melee)
Captain Olimar (Load SSBM with a Pikmin save on your memory card)
Donkey Kong Junior (Complete Classic with all 25 characters)
Mach Rider (Complete Classic in less than 5 minutes)
Sheriff (Combined Target Test time less than 750 seconds)
Diskun (Get every end-of-level bonus and penalty)

Mode Unlock: Random Stage:
Unlock every stage except for Battlefield, Final Destination, Dream Land N64, Yoshi's Island N64, and Kongo Jungle N64. This option appears in Additional Rules under Custom Rules in VS mode and allows you to exclude stages you don't want to go to when you use the Random stage select option.

New Background Music for Gallery Mode:
Once you have unlocked the Music Test, choose a song you would like to hear in the Gallery mode by pressing A. Now exit by pressing B, and then go to Gallery mode. Now you can look at trophies while listening to your favourite SSB: Melee song;)

Random Character Select:
The vacant spots in each bottom corner of the character select screen (left of Pichu and right of Roy) will randomly select a character for you if you place your token there and press ''A.''

Random Character Select (Tournament Melee):
When playing Tournament Melee, press L and R simutaneously at the character select screen and your character box will become the Pokémon, Ditto. This purple blob represents ''Random.'' However, this trick only works in ''Winner Out'' and ''Loser Out'' matches.

Samus's Secret Throw:
Samus has a secret throw that can be performed at any time. Its a bit more difficult to perform than Fox and Falco's secret taunts. Press Z repeatadily to extend her grappling hook but not so repeatadily as to shield. While pressing Z, rotate counter clockwise on the Control Pad. If done properly, her grappling hook will extend by three times. It will now remain this way until he is KOd (then you must redo the trick). The longer grappling hook is very useful. It won't grab opponents unless you press A or Z once it touches them. It will also home onto the nearest opponent if you hold L once firing it out. The grappling hook is also longer in the air which proves to be a much more useful recovery move than her Screw Attack (Up + B).

Stage Unlock: Battlefield Stage:
To unlock the Battlefield stage, complete the All-Star 1-P mode for the first time.

Stage Unlock: Big Blue Stage:
To unlock the Big Blue stage, you must play at least 150 matches in VS. mode (without quitting).

Stage Unlock: Brinstar Depths Stage:
To unlock the Brinstar Depths stage, you must play at least 50 matches in VS. mode.

Stage Unlock: Dream Land Past Stage:
To unlock the Dream Land stage of the past, beat Target Test with all characters, regular and hidden.

Stage Unlock: Final Destination Stage:
To unlock the Final Destination stage, you must complete all 51 Event Matches.

Stage Unlock: Flat Zone Stage:
To unlock the Flat Zone stage, you must complete 1-P Classic mode at any difficulty/stock with Mr. Game & Watch.

Stage Unlock: Fourside Stage:
To unlock the Fourside stage, you must play at least 100 matches in VS. mode (without quitting).

Stage Unlock: Kongo Jungle Stage:
To unlock the Kongo Jungle from the N64 version of this game, complete the 15-Minute Melee. I'd recommend using Donkey Kong and constantly use his Down + B move the entire time (thanks to DEngel's Secrets guide, for I used that strategy to unlock this myself)!

Stage Unlock: Mushroom Kingdom II Stage:
To unlock the Mushroom Kingdom II stage, which is from Super Mario Bros. 2 on the NES, simply collect a Birdo trophy. The trophy is random, but when you find/win it, you get this stage.

Stage Unlock: Poké Floats Stage:
To unlock the Poké Floats stage, you must play at least 200 matches in VS. mode (without quitting).

Stage Unlock: Yoshi's Island Past Stage:
To unlock the original Yoshi's Island stage from the N64 version of the game, use Yoshi and hit over 1,350 ft. (400m in the JP version) in the Home-Run Contest. To do such, stand next to the Sandbag and TAP the X or Y buttons to jump, then use the Down + A move to hit the bag for around 30% damage each time. Do that about 4 times to get the bag up to around 100-110% damage. Since you won't have much time left, get the bat and use a Smash hit to send the bag flying. If you did it all well enough, you should make it well over the required distance.

Transform with Zelda before battle:
In Classic Mode, if you pick Zelda, you can transform into Sheik (or vice versa if you're already playing as Sheik) before the battle starts. On the match-up screen, hold Down (Control Stick) + A until the battle starts. You'll automatically transform before it begins.

Trophy Arangements:
Hold down the Y-button while entering your Collection to arrange trophies in a triangle.

Hold down the L button to arrange your trophies in rows while entering your Collection.

Hold down the R button to arrange your trophies in a circle while entering the Collection.

Unlock All-Star Mode:
To unlock All-Star mode, simply unlock all the hidden characters (including Mr. Game & Watch).

Unlock Event #51:
To unlock Event 51, The Showdown, you must complete Events 1-50 first.

Unlock events #40 through #50:
To unlock events #40 through #50, you must unlock all of the secret characters.

Unlock Events 30-39:
Unlock Luigi, Falco, and Young Link to get Events 30-39 in the Event Mode.

Unlock Sound Test:
To unlock the Sound Test, you must open all secret stages. This means you must also beat all 51 Events (since you get Final Destination from the 51st), and unlock all secret characters (since you need them to access the higher number events).
Sent in by Chris Green

An easy way to get Mewtwo: To do this trick you will need a second controller. Then go to VS. mode's custom rules and turn the time limit to 0.Also set the rules with one stock. Next turn off all items. Then exit out of this menu and enter Melee mode. After that start up a VS. match with any two characters. (Make sure there is no computers playing). Set the stage to Yoshi's Story. Once the match begins your job is done. After 20 hours of play time make one of them jump out of the ring and Mewtwo will emerge to battle. Defeat him and he's yours to keep.
Sent in by:KcTrias

Hints: Teamwork on attack and defence against friends or the computer. {2-3 players to work.} Okay, battling against your friends and computer foes, no problem. But is your fight missing something? Well, you came to the right person. Here are a few helping tips to make your day...nice.

Double or triple the protection: Simple actually, just go to each other and lightly hold the L or R button.

Mario, Luigi, and Dr. Mario can perform the following together (or just 2)

Tri fireball and pill combo: First get together and press the B button at the same time.

Super tornado: Surround an opponent and together press Down, B.

Tri Super jump: Together press Up, B

Beat Up: Grab the opponent and let your helpers do the dirty work.

The A button`s wrath: Mua Ha,Ha,Ha! Hit your opponent repeatedly to a wall or surround him or her by repeatedly taping the A button.

Thanks for checking out my hints. Be sure to check later for future hints!
Sent in by Waahoo74

To unlock Luigi, simply play adventure mode with any character. At the end of the first board before you cross the finish line, make sure that the timer on the clock ends with the number 2. You will fight Luigi instead of Mario on the next board. Simply finish the adventure mode without continuing and you will unlock Luigi.
Sent in by: TwoMuchOfaHottie

get Sonic and Tails: Get 20 ko's in cruel melee with the character of your choice and they will challenge you beat them and they are yours!!
Sent in by Mike Goertzen

Get Sonic and Tails. First goto cruel Melee. Then unlimeted and beat exactally 20 guys. then die and you will have sonic and tails.
From Masta Chunks

Mewtwo: Simply play a versus match for 20 hours/or play versus match 700 times.
Change BGM in Break The Targets: Press Start then Z.
Get stages: Old Kongo Jungle-Survive in 15 minutes melee. 
Old Yoshi's land- get a over 400m record on home run contest. 
PuPuPuland-Complete break the targets for EVERY character(Even secrets)
Sent in by Kyle Chiu 

Mr. Game & Watch Alternatively:- Successfully complete 1P Target Test Mode With All Characters Including the Secret Ones.
Sent in by:Wcbzero

Cheat code: Prince Marth - To unlock Marth, Play verses mode with all default characters. (note: It doesn't matter who you fight).
Sent in by: CubeKid

All characters, levels, and trophies:-  at the start up press up, down, up, right, right, down, left. Then, beat the game with Mario on classic mode being sure to pick up the Four Giants trophy. Last, you go to the start up screen and press R,left,up,left,right,L,start you should have everything.
Sent in by King Ganondorf 

Bonus Characters and places:-  In SSBM, the regular characters are Peach, Fox, Luigi, Mario, Samus, Kirby, Link, DK. Now the bonus characters are Yoshi, Pikachu, Capt. Falcon, Ness, Bowser, and the Ice Climbers [you control one, the other one is an ally]. But when you get Ness and Capt. Falcon, you get their bonus places.

Play as Paratroopa:-  To Play as Paratroopa, the winged turtle, put in the following at the character select screen: Up, Down, Left, Right, Up, Up, Right, and press start on Yoshi. When playing with Paratroopa, you'll notice that you can coast him around the sky with the control stick! 

Dr. Mario: -  Successfully complete the game in classic mode under the very easy difficulty setting without losing a life. 

Gannondorf:-  Defeat Gannondorf in Event 29 to unlock him as a playable character. 

Falco:-  Complete the 100 man spar. 

Young Link:-  Successfully complete the game in classic mode under the very easy difficulty setting without losing a life. 

Pichu:-  Unlock Luigi and Falco, then enter Event 37 and win the match. 

Luigi:-  Successfully complete the game in adventure mode two times. 

Jigglypuff (Purin):-  Successfully complete the game in adventure mode under the normal difficulty setting. 

Mr. Game & Watch:-  Successfully complete the game in classic mode with all the characters. 

Roy:-  Successfully complete the game as Marth in classic mode under the very easy difficulty setting without losing a life. 

Mario USA stage:-  Success fully complete the game as Princess Peach in classic mode without losing a life. A level based on the Mario USA level from Super Mario Brothers. 2 will now be unlocked. 

Pikmin trophy:-  Insert a memory card with a saved game from Pikmin. Begin the game and a Pikmin trophy will be available. 
Sent in by PerfectoRamos@aol.com

Action Replay Codes

(M)
MMGK-1CC5-TER04
7CDF-NREA-Q4278

Open all characters
0FA2-KD7C-4590B
A4BP-APCY-5DFMK