Unlockable character

Characters

Character	How to Unlock	VS Matches Required
Dr. Mario	Complete Adventure with Mario without using a Continue	100
Falco Lombardi	Clear 100-Man Melee	300
Ganondorf	Complete Event Match #29 (Triforce Gathering)	600
Jigglypuff	Complete Classic or Adventure Mode	50
Luigi	Complete Stage #1 of Adventure with time ending in a "2"	800
Marth	Play Classic Mode with all 14 regular characters, or use them in VS. mode	400
Mewtwo	Play VS. mode for a combined total of 20 hours*	700
Mr. Game & Watch	Complete Adventure & Classic Mode with all characters, or Clear Target Test with all characters	1000
Pichu	Complete Event Match #37 (Legendary Pokemon)	200
Roy	Complete Classic Mode with Marth	900
Sheik	Already unlocked**	n/a
Young Link	Complete Classic Mode with 10 different characters	500

Stages

Stage	How to Unlock
Eagleland - Fourside	Play 100 VS. Matches
F-Zero Grand Prix - Big Blue	Play 150 VS. Matches
Past Stages - Dream Land	Clear Target Test with all 25 characters, with a time of less than 25 minutes
Past Stages - Kongo Jungle	Clear 15-Minute Melee
Past Stages - Yoshi's Island	Hit more than 1350ft/411.5m with Yoshi, in Home Run Contest
Kanto Skies - Poke Floats	Play 200 VS. Matches
Mushroom Kingdom - Mushroom Kingdom 2	Unlock the Birdo Trophy
Planet Zebes - Brinstar Depths	Play 50 VS. Matches
Special Stages - Final Destination	Clear Every Event Match
Special Stages - Battlefield	Complete All-Star Mode
Superflat World - Flat Zone	Complete Classic Mode with Mr. Game & Watch

Footnotes

* Time required to unlock Mewtwo can be split between players (eg. 2 human players requires 10hrs, 3 human players requires 6hrs 40mins, and four players requires 5hrs.

** Sheik is not on the character select menu; she can be used by using Zelda in a match, and using her b-down move. Conversely, using Sheik's b-down move will transform Sheik back into Zelda.