EasterEggs

How to change from Samus to Zero Suit Samus in the beginning of a brawl
If you want to be Zero Suit Samus at the start of a brawl and not wait for a Smash Ball, just choose Samus from the character-selection menu, press and hold the Z button on your Nunchuk, (If you chose a different Shield button in the Options menu, press that instead) then proceed to the next screen. Choose a stage, then when you start the brawl, you’ll be Zero Suit Samus! Another way is to quickly taunt up and down.

How to get Toon Link to join your team in the Subspace Emissary
Go to the Forest stage and go past a few Primids. Then, you will see a door floating in the air and go through it. Now, you will be at a cutscene where you see Toon Link on a boat. After that, you will battle Toon Link on a new stage called the Pirate Ship. Beat him and he joins your team. Note that the floating door only appears if you beat the Subspace Emissary.

List of Assist Trophies (unlockable in bold)
Knuckle Joe: Punches enemies repeatedly and then deals the final blow
Andross: Goes in the back and shoots “squares” at enemies.
Metroid: Attaches to an opponent and deals damage to that enemy continuously.
Walugi: Attacks enemies in the air and ground by kicking or hitting them with his tennis racket,
Stafy: Spins around and tries to damage the other brawls but is easy to KO.
Shadow the Hedgehog: Slows down gameplay except for the person who summoned; kind-of like the Timer item. (unlock Sonic).
Devil: Moves the screen in random directions.
Excitebikes: Sends pixelated excitebikes across the stage.
Lakitu & Spinies: Sends Lakitu up and Lakitu throws Spinies down.
Little Mac: Appears and starts punching enemies continuously.
Lyn: Crouches, vanishes, and then strikes the enemies.
Barbara: Unlock 25 or more hidden songs.
Custom Robo: Flies around and shoots everyone that it can (do 100 brawls).
Isaac: Creates a hand that pushes enemies away (do 200 brawls).
Samurai Goroh: Slashes away with his sword and moves around.
Dr. Wright: Shoots a building out from the ground on a side of him. Every 1/8 of the time, it’s a huge skyscraper.
Mr. Resetti: Starts talking about something and blocks part of the screen. When he gets angry, he can cause damage to anyone near him and he screams when he is taken of the screen on a scrolling stage.
Gray Fox: Slices his sword over and over. He also reflects projectiles. (unlock Snake.)
Saki Amamiya: Uses his Cannon Sword to cut and slices enemies.
Tingle: Does a random effect. (sends out a lot of hammers, zooms in on person who summoned him, etc.)
Kat & Ana: Cuts a “X” shape on the stage. Like Latio and Latios.
Jeff: Launches four homing-mini-missiles and then a bigger homing-missile.
Helirin: Spins and moves around to become a new platform.
Jill & Drill Dozer: Goes back and forth across the stage while drilling anyone that gets in her way.
Nintendog: Gets up close to the screen and moves around thus blocking the view of gameplay.
Hammer Bro: Throws hammers at enemies.

How to unlock Ganondorf in the Subspace Emissary
Go to the Entrance to Subspace stage and save Link and Zelda from Subspace and, when you finish the level, there will be a cutscene and he will join your team.

How to unlock Jigglypuff in the Subspace Emissary
Go to the Swamp stage and keep going until you battle Dark Diddy Kong. After that, keep going until you get to you see a red door. You will have to pass by the door because of the barrel cannons. Go back to the door without going in any of the barrel cannons and go through the door. Then, there will be a cutscene where you see Jigglypuff on the Pokemon Stadium. Beat her and she will join your team. Note that the floating door only appears when you beat the Subspace Emissary.

How to unlock Wolf in the Subspace Emissary
Go to the Ruins stage and keep going until you get to a platform that keeps moving down. Keep going until you see a door on your left. Do NOT go inside it. Go past it and the platform that you are on will disappear. Fall down to the bottom and you will see a door floating near the bottom. Go in it and you will see a cut scene where you will see Wolf jump from his ship, the Wolfen. Beat him and he will join your team. Note that the floating door will only appears once you beat the Subspace Emissary.

Unlockable Modes
Here are both unlockable modes!
All-Star Mode: Unlock all characters.
Boss Battles Mode: Beat the Subspace Emissary.

An easy way to get trophies
This is an easy way to get more than 100 different trophies!
If you beat Classic mode with a character, you get that character’s trophy. If you do this with all 37 characters (Zelda/Sheik, Samus/Zero Suit Samus), you have just there 37 trophies! If you do this, you get a Paper Mario trophy for beating Classic with all characters, and a Creeping Chrysanthemum trophy for getting trophies for all characters! That’s 39 trophies! But if you clear Classic mode…
On Easy difficulty, you get a Running Chibi-Robo Sticker!
On Normal difficulty, you get an Icicle Mountain (Melee) CD!
On Hard difficulty, a Credits (Super Smash Bros.) CD!
On Very Hard difficulty, a Striker Mario trophy!
On Intense difficulty, a Crazy Hand trophy!
With 20 characters, a Master Hand trophy!
That gives you a whopping 42 trophies, 2 more CDs, and a sticker! Let’s move on…
How about All-Star mode? If you complete that with a character, you get that character’s Final Smash trophy! Do this with all 37 characters, you now have 79 TROPHIES! But if you clear All-Star…
On Easy, a Tal Tal Heights CD!
On Normal, a Phyllis sticker!
On Hard, a Birdo trophy!
On Very Hard, a Dyna Blade trophy!
On Intense, a Mewtwo trophy!
With no continues, a Pichu trophy!
With 10 characters, a Gekko trophy!
With all characters, a Kyle Hyde trophy!
Get Final Smash trophies for all characters, a Plusle and Minun trophy!
Amazing! You now have 88 trophies, another CD, and a sticker! Moving on…
Boss Battles mode! The mode where you fight all the bosses in the game. Of course, your work in beating this does not go unrewarded! Beat it…
On Easy, a Subspace Bomb trophy!
On Normal, a Shadow Bugs trophy!
On Hard, a Dark Cannon trophy!
On Very Hard, a Porky Statue trophy!
On Intense, a Galleom (Tank Form) trophy!
With 10 characters, a Subspace Gunship trophy!
With 20 characters, a Jyk trophy!
With all characters, a Winged Tabuu trophy!
96 trophies! But I’m not done yet! An easy way to get boss trophies is next! To do this, go to Boss Battles, and fight a boss. When they’re down to critical health, throw a Trophy Stand at them and they will turn into a trophy! To get Trophy Stands, you just have to wait until one appears. They appear more on higher difficulties. If you get a trophy for each boss, that’s a grand total of 105 trophies!!!