Super Smash Bros. Brawl Cheats/Hints

Unlockable Modes:

All-Star Mode - Unlock all the hidden characters
Boss Battle Mode - Complete the Subspace Emissary

Unlockable Stages:

Luigi's Mansion - Use Luigi in brawl 3 times
Jungle Japes - Play on any Melee stage 10 times in VS Mode
Pokémon Stadium - Play on Pokémon Stadium 2 10 times in VS Mode
Hanenbow - Complete Event #28
Mario Bros - Beat Challenge #19
Great Sea - Unlock Toon Link
Big Blue (Melee) - Brawl as Captain Falcon 10 times
Spear Pillar - Clear stage #25 in Event Mode
Green Hill Zone - Unlock Sonic
Flat Zone 2 - Unlock Mr. Game & Watch
Green Greens - Fight as Kirby in VS mode 20 times
75m - Brawl as Donkey Kong 20 times

Unlockable Events:

Events 11-20 - Complete 7 events
Events 21-28 - Complete the Subspace stage in Adventure Mode
Events 29-40 - Unlock all hidden characters
Event 41 - Complete all 40 evnts
Co-op Events 9-13 - Complete the Subspace stage in Adventure Mode
Co-op Events 14-20 - Complete 10 Co-Op Events and unlock all hidden characters
Co-op Event 21 - Complete all 20 Co-op Events

Unlockable Characters:

Jigglypuff - 350 Brawl Matches OR Fight her in Swamp stage in SSE after completing it OR complete SSE then Events 1-20
Captain Falcon - 70 Brawl Matches OR Have him join in SSE OR Beat Classic in 12 minutes or less then defeat him in the following match
Sonic - 300 Brawl Matches OR Have him join in SSE OR Beat Classic Mode with 10 characters
Luigi - 22 Brawl Matches OR Have him join in SSE OR Complete Classic without continuing
Snake - 130 Brawl Matches OR Have him join in SSE OR Play 15 matches on Shadow Moses Island
Lucario - 100 Brawl Matches OR Have him join in SSE OR Complete all 5 Target Tests with a character
Ness - 5 Brawl Matches OR Have him join in SSE OR Reflect ten projectiles
Falco - 50 Brawl Matches OR Have him join in SSE OR Complete 100-man brawl
Mr. Game & Watch - 250 Brawl Matches OR Have him join in SSE OR Clear Target Tests on any level with 30+ characters
Toon Link - 400 Brawl Matches OR Fight him in Forest stage in SSE after completing it OR After beating SSE, finish the Classic mode
Wolf - 450 Brawl Matches OR Fight him in Ruins stage in SSE after completing it OR Complete Boss Mode with Fox or Falco
R.O.B. (Robot) - 160 Brawl Matches OR Have him join in SSE OR Get 250 different Trophies
Ganondorf - 200 Brawl Matches OR Collect Zelda and Link trophies in SSE to have him join you OR Clear Classic on Hard with Link or Zelda
Marth - 10 Brawl Matches OR Have him join in SSE OR Finish Classic on any difficulty

How To Unlock Hidden Assist Trophies:

Shadow the Hedgehog Assist Trophy - Unlock Sonic the Hedgehog.
Barbara Assist Trophy - Unlock 25 or more CDs.
Gray Fox Assist Trophy - Unlock Snake.
Ray MK III Assist Trophy - Play 100 brawls.
Isaac Assist Trophy - Play 200 brawls.
Advance Wars Assist Trophy - Play 300 brawls.

Unlockable Target Tests:

Level 2 (Medium) - Beat Target Test in Classic Mode twice on Easy or once on Medium
Level 3 (Hard) - Beat Target Test in Classic Mode twice on Medium or once on Hard
Level 4 (Very Hard) - Beat Target Test in Classic Mode twice on Hard or once on Very Hard
Level 5 (Intense) - Beat Target Test in Classic Mode twice on Very Hard or once on Intense

Unlockable Stage Builder Parts:

Edit Parts A - Play 10 vs. matches on Stage Builder Stages
Edit Parts B - Create 5 Stages in Stage Builder
Edit Parts C - Create 15 Stages in Stage Builder

Unlock Virtual Console Trials:

Donkey Kong - Exceed 10 hours of play time
Super Mario USA - Win in VS mode with Peach over 5 times
Super Mario World - Play yoshi's Island (melee) over 3 times
F-zero - Beat SSE having used captain Falcon
Legend of Zelda: Ocarina of Time - Use Toon Link over 10 times

Unlock More Rules:

More Rules - Get 200 KOs In Standard Brawl

If your struggling to find 'More Rules' have a gander at the Rules Screen at the bottom

Unlockable Stickers:

Boo [Mario Tennis] - Hit over 900 ft. in the Home-Run Contest
Liquid Snake [Metal Gear Solid: The Twin Snakes] - Defeat 10 Alloys in Cruel Brawl
Running Chibi-Robo [Chibi-Robo] - Clear Classic mode on Easy difficulty with any character
Phyllis [Animal Crossing: Wild World] - Clear All-Star mode on Normal difficulty with any character
Ryuta Ippongi [Duendan 2] - Clear 100-Man Brawl in under 3 minutes, 30 seconds

Unlockable Music:

02 (Zero Two) Boss Theme (Kirby 64) -Have a total of 5000 coins collected in vs. coin matches
100-Man Melee 1 - Clear 100-Man Brawl under 4 minutes
3D Hot Rally Title - Clear Target Level 5 With Anyone
Ai no Uta (French Version) - Hit 37,500ft. combnd with all fighters' Home-Run Contest records
Bob-Omb Battlefield (Super Mario 64) - Have a total of 50 hours of vs. gameplay
Clu Clu Land - Hit 1,200 feet or more in Home-Run Contest with any character
Dragon Roost Island - Unlock Toon Link
Dream Chaser - Play 10 vs. matches on Port Town
Echoes (Metroid Prime 2) - Brawl on the Frigate Orpheon stage 10 times
Ending (Metroid) - Play 10 vs. matches on Norfair
Excite Truck - Complete Target Test Lv.2 under 19 seconds with any character
Fire Field - Complete Event #24
Frozen Hillside - Play on the Halberd stage 10 times in VS mode
Goruda - Play 10 vs. matches on Halberd
Great Temple - Complete Event #33 on Difficult
Ice Climbers (Melee) - Clear Classic Mode on Easy with any character
Icicle Mountain (Melee) - Clear Classic on Normal Difficulty with any character
Ike's Theme - Find Ike in the Subspace Emissary
King Dedede's Theme - Complete Event #15
Kuru Kuru Land - Get a distance of 400m in Home-Run Contest with one character
Legendary Air Rider Machine - Complete Event #13
Love Song (commercial version) - Get a combined distance of 12500m in Home-Run Contest
Mach Rider (melee version) - Defeat 50 alloys in Endless Multi-Man Brawl
Menu 2 - Unlock All 35 Characters
Metroid Prime 2: Multi-Play - Play 10 vs. matches on Frigate Orpheon
Molgera Battle - Unlock Toon Link
Mountain and Forest - Complete Event #18 on Difficult
Peach Castle (Melee) - Unlock all Melee stages
Pokémon Center - Collect 200 stickers
Powerhungry Fool - Play 10 vs. matches on Castle Siege
Road to Tokiwa - Complete Event #8
Snake Eater - Play 15 vs. matches on Shadow Moses Island
Song of Storms - Complete Event #37
Staff Credits Music - Clear Classic Mode on Difficult
Star Wolf (Star Fox: Assault) - Complete Event #38 on Difficult
Taru Taru Heights - Clear All-Star Mode on Easy
The Great Sea - Unlock Toon Link
Title from 3D Hot Rally - Clear Target Smash Level 5
Underwater BGM (Super Mario Bros) - Play 10 vs. matches on Mushroomy Kingdom
HIS WORLD - Play on "Green Hill Zone" 10 times

Mid-Battle Conversations:

While battling in Super Smash Bros Brawl Fox, Falco, Corneria and Wolf can have mid-battle conversations. Below are the characters and the arenas they can do this:

Fox/Falco: - Lylat Cruise, Corneria (Melee stage)
Wolf: - Lylat Cruise
Snake: - Shadow Moses Island