There are two methods to acquiring Zero Suit Samus. The first and easiest method is to hold down the R button (on the GameCube or Classic controllers) or the B button (on the Wiimote) from the stage select screen. Hold down R, select Samus, select your stage, and then release the R button. You should start the battle not as "armored" Samus, but Zero Suit Samus.
The other method is if you decide to start the battle as regular Samus. You can switch to Zero Suit Samus by quickly pressing up and down repeatedly extremely fast on the d-pad. This is difficult to do, and can't be done on the Wiimote (since the A button only provides one taunt, and there's no other equivalent). If you do this, keep in mind that you can't switch back during the battle to regular "armored" Samus.

To build your own stages in the game, you must first unlock the parts necessary to build these stages. They come in three droves, and can be unlocked via the methods below.

• Edit Parts A - Play ten times on stages you built
• Edit Parts B - Build at least five stages
• Edit Parts C - Build at least fifteen stages

To unlock All-Star Mode, you must have all thirty-five characters unlocked on your roster.

Unlocking Sheik is easy. To play as her, select Zelda at the character select screen while holding A. Don't let go of A until the match begins, and Zelda will automatically transform into Sheik.

To unlock Boss Battle Mode, complete The Subspace Emissary (known also as Adventure Mode).

To unlock the stages below, fulfill the requirement listed.

• 75m - Play as DK 20 times
• Big Blue (old) - Play as Falcon 10 times
• Electroplankton - Complete Event Match #28
• Flat Zone 2 - Unlock Mr. Game & Watch
• Great Sea - Unlock Toon Link
• Green Greens - Play as Kirby 20 times
• Green Hill Zone - Unlock Sonic
• Jungle Japes - Fight in VS. Mode 10 times
• Luigi's Mansion - Fight with Luigi in VS. Mode 3 times
• Mario Bros. - Complete Event Match #19
• Pokémon Stadium - Fight in Pokémon Stadium 2 10 times (VS. Mode)
• Port Town - Play as Falcon 10 times (VS. Mode)
• Spear Pillar - Complete Event Match #25

• Donkey Kong - Play SSBB for ten hours
• F-Zero - Complete the Subspace Emissary
• Super Mario Bros. 2 (USA) - Win with Peach in VS. mode five times
• Super Mario World - Play on Yoshi's Island's stage three times
• The Legend of Zelda - Play as Toon Link ten times

• Hard Difficulty - Easy Mode x2 / Medium Mode x1
• Intense Difficulty - Very Hard Mode x2 / Intense Mode x1
• Medium Difficulty - Easy Mode x2 / Medium Mode x1
• Very Hard Difficulty - Hard Mode x2 / Very Hard Mode x1

To unlock the following single player events, fulfill the requirement listed.

• Events #1-#10 - Automatically unlocked
• Events #11-#20 - Beat at least seven events
• Events #21-#28 - Beat Subspace Emissary
• Events #29-#40 - Unlock all thirty-five characters
• Event #41 - Beat all forty previous events

To unlock the following multi-player events, fulfill the requirement listed.

• Events #1-#8 - Automatically unlocked
• Events #9-#13 - Beat Subspace Emissary
• Events #14-#20 - Unlock all characters and beat any ten multi-player events
• Event #21 - Beat all twenty previous multi-player events

To unlock the characters below, fulfill the requirement listed. If there is a number in parenthesis next to a character, such as "(160)", this signifies that you can also unlock this character simply by playing that many matches in VS. mode. All characters can be unlocked by meeting them in the Subspace Emissary, as well. Keep in mind that you must defeat the unlocked character in a battle to retain him on the roster permanently.

• Captain Falcon - Complete Classic Mode in twelve minutes or less. (70)
• Falco - Complete 100-Man Brawl. (50)
• Ganondorf - Complete Classic Mode on Hard difficulty using either Zelda or Link. (200)
• Jigglypuff - Complete Classic Mode or complete Event Match #20. (350)
• Lucario - Using Meta Knight, defeat Lucario in Adventure Mode. Or, complete five Target Tests. (100)
• Luigi - Complete Classic Mode on Easy difficulty. (22)
• Marth - Complete Classic Mode. (10)
• Mr. Game & Watch - Complete Classic Mode with each character. (250)
• Ness - Reflect ten projectiles in battle, or defeat him in Adventure Mode. (5)
• R.O.B. - (160)
• Snake - Play fifteen matches on Shadow Moses Island. (130)
• Sonic - Complete Adventure Mode. (300)
• Toon Link - Clear Subspace Emissary and then clear classic mode with anyone. You can also find him during Subspace Emissary (after you beat it - in Forest stage). --Jeselle (400)
• Wolf - Complete Adventure Mode, and then complete Boss Battle Mode using Fox. (450)

Below are a list of musical tracks that can be unlocked in the game. On the left, you will find the name of the song in question, while to the right of each title, the method in which songs are unlocked is listed.
Additions by OrchidPrime.

• 3D Hot Rally Title - Complete Target Level 5
• Clu Clu Land - Hit a home run of at least 1,200 feet during a Home Run Contest
• Dream Chaser - Play ten VS. matches on Port Town
• Excite Truck - Complete Target Level 2 in under twenty seconds
• Fire Field - Complete Event Match #24
• Frozen Hillside - Play ten VS. matches on Halberd
• Goruda - Play ten VS. matches on Halberd
• Great Temple - Complete Event Match #33 on difficult difficulty
• His World - Play ten VS. matches on Green Hill Zone
• Icicle Mountain - Complete Classic Mode on normal difficulty
• Ike's Theme - Find Ike in the Subspace Emissary
• King Dedede's Theme - Complete Event Match #15
• Kuru Kuru Land - Get 400m or more in the Home Run Contest
• Legendary Air Rider Machine - Complete Event Match #13
• Love Song - Get a combined distance of 12,500m in Home Run Contest
• Mach Rider - Defeat fifty enemies in Endless Multi-Man Brawl
• Menu 2 - Unlock all thirty-five characters
• Metroid Ending - Play ten VS. matches on Norfair
• Metroid Prime 2 - Play ten VS. matches on Frigate Orpheon
• Mountain Forest - Complete Event Match #18 on difficult
• Multi Man Melee - Beat a 100-person brawl in four minutes
• O² - Gather at least 5,000 Coins during Coin Matches
• Powerhungry Fool - Play ten VS. matches on Castle Siege
• Princess' Castle - Unlock all stages from SSB Melee
• Road to... - Complete Event Match #8
• Snake Eater - Play fifteen VS. matches on Shadow Moses Island
• Song of Storms - Complete Event Match #37
• Staff Credits - Complete Classic Mode on hard difficulty
• Star Fox Assault Theme - Complete Event Match #38 on hard difficulty
• Super Mario 64 Theme - Play VS. mode for fifty hours
• Super Mario Underwater - Play ten VS. matches on Mario Bros.
• Taru Taru Highlands - Complete All-Star Mode

There's a stage in the game known as Mushroomy Kingdom. However, there's an alternate version of the stage that will appear at random. If you want to force the game to choose the alternate version of the stage, hold down the R button (on the GameCube or Classic controllers) or the B button (on the Wii remote) while selecting Mushroomy Kingdom. After the match begins, you can release the button. If done properly, you'll find yourself not in Mushroomy Kingdom, but in an entirely different stage.

After you've managed to unlock each and every stage in the game (there are forty), you gain the ability to exclude stages from the random stage selector that you don't want to play on.

Once you've managed to get 200 KO's in Brawl, you'll unlock "More Rules" for the game, which can be found at the bottom of the rules screen.

After choosing your character on the character select screen, you can mess around with the characters, which most people know. You can select varying colors for each character and the like. However, there are two characters who have more important character selection options -- Princess Zelda and Pokémon Trainer. For these two characters, you can do more than just select colors. For Zelda, you can choose to start as Zelda or Shiek (simply press one or the other). For Pokémon Trainer, you can select which of his three Pokémon he'll start the battle with.

Here's a great way to unlock all of the characters in the game rather effortlessly. It should only take around two hours. Since all of the hidden characters can be unlocked in some way via Brawling (versus mode), you can slant the mode in your favor to do rack up Brawls quickly and effortlessly.
Start by selecting the Special Match mode. Set it to Stamina and Flower modes, and on the character selection screen give the CPU 1 health and your character anything over that amount. (Make sure it's on 1 Life Stock mode). Set the map, at least until you unlock Snake, to Shadow Moses Island. Play with these rules for about two hours and you'll rack up 500 matches in Brawl, more than enough needed to unlock all of the characters. Just remember -- you have to beat the character you're trying to unlock!

Want to know if a stage in Subspace Emissary is completely looted/cleared/explored? Check the little green flag on the stage. If there is a green flag on the stage, that means you have not completely explored it for 100%.

If you're in a hurry to just get all the characters out and about, use this method:

• 1. Special Brawl
• 2. Stamina to lowest percentage
• 3. Flower on head
• 4. Keep pressing start whilst sitting at computer.

You'll have 500 matches in no time and should unlock everyone on the character roster. As a rough indication on how long it takes, I got everyone in less than an hour using this method. So for anybody with an hour to spare, this is a great way to do it. Alternately, you could play the mediocre Subspace Emissary, but it's up to you.

I see people who still haven't got this challenge completed, so I offer my tips to help you save a golden hammer or two.
Build a stage with platforms directly spikes, set a coin match up for maybe 10 minutes or so, then drop the characters down onto the spikes so they keep bouncing straight up and down between the spikes and platforms.
I managed to get roughly 22,000 coins in 15 minutes using two Sheiks because she seemed to fall faster than Marth.

You can turn off all items except the Homerun Contest Sandbag (Punching Bag w/ eyes) and use a custom stage with a conveyor belt and solid block to constantly spawn stickers and CDs (Brawl Mode).

Here's a really interesting feature to the game that can only be executed by Snake while playing on his stage, Shadow Moses Island. If you have your taunts set to the d-pad on either the Gamecube controller or the Wii controller, press down on the d-pad repeatedly. This must be done extremely fast.
If executed properly, Snake will take a knee and get on his Codec, where he'll speak with familiar characters from the Metal Gear Solid series, including Otacon, Colonel Campbell, and the like. You'll have a completely unique, often humorous conversation with the person on the other end of the Codec depending on who you're fighting. That's right -- there are completely unique conversations for each character, including character variants (Shiek, Zero Suit Samus, the various Pokémon). Give it a try!
Additionally, if Snake is killed when using the Codec, another interesting sequence occurs.

If you're playing on Lylat Cruise with two of the three characters from the Star Fox series (Fox, Falco, or Wolf), you can have a conversation between characters. Press down repeatedly on the d-pad (so long as your taunts are mapped to the d-pad) during the battle, and the conversation should occur. This can only happen on the Lylat Cruise stage, and only with two of the three characters from the Star Fox series on that stage at one time.