Unlockable: Virtual Console Trials
You can unlock Virtual Console trials of old classic Nintendo games by fulfilling the requirements listed.
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
Submitted by smilyguy101
Unlockable: Hidden Characters
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. 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 twenty 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, or defeat him Adventure 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 - Complete Classic Mode with Link. (400)
Wolf - Complete Adventure Mode, and then complete Boss Battle Mode using Fox. (450)
Submitted by smilyguy101
Unlockable: Target Tests
You can unlock the following Target Tests by completing Classic Mode in the ways listed. There are two methods to unlock each Target Test, and both are listed. "Easy Mode x2 / Medium Mode x1" for instance means that you must complete Classic Mode twice on easy or once on medium to unlock the corresponding Target Test difficulty.
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
Submitted by smilyguy101