Unlockables

Fighters
Italicized means you must beat them in a fight afterwards.

Rosalina

 * Play 10 matches
 * Clear Classic Mode
 * Beat Rosalina's stage in Extreme Labyrinth
 * Scan a Rosalina amiibo

Roy

 * Play 20 matches
 * Beat Roy's stage in Extreme Labyrinth
 * Scan a Roy amiibo

Toon Link

 * Play 30 matches
 * Beat Toon Link's stage in Extreme Labyrinth
 * Scan a Toon Link/Young Link amiibo

Lucario

 * Play 40 matches
 * Beat Lucario's stage in Extreme Labyrinth
 * Scan a Lucario amiibo

Joker

 * Play 50 matches
 * Defeat Crazy Hand
 * Beat Joker's stage in Extreme Labyrinth
 * Scan a Joker amiibo

Lucas

 * Play 60 matches
 * Beat Lucas's stage in Extreme Labyrinth
 * Scan a Lucas amiibo

Dixie Kong

 * Play 70 matches
 * Beat Dixie Kong's stage in Extreme Labyrinth
 * Scan a Dixie Kong amiibo

Mach Rider

 * Play 80 matches
 * Beat Mach Rider's stage in Extreme Labyrinth
 * Scan a Mach Rider amiibo

Black Shadow

 * Play 90 matches
 * Beat Black Shadow's stage in Extreme Labyrinth
 * Scan a Black Shadow amiibo

Ryu

 * Play 100 matches
 * Defeat Master Hand & Crazy Hand together
 * Beat Ryu's stage in Extreme Labyrinth
 * Scan a Ryu/Ken amiibo

Bowser Jr.

 * Play 110 matches
 * Beat Bowser Jr.'s stage in Extreme Labyrinth
 * Scan a Bowser Jr./Koopaling amiibo

Hector

 * Play 120 matches
 * Beat Hector's stage in Extreme Labyrinth
 * Scan a Hector/Jill amiibo

Ganondorf

 * Play 130 matches
 * Beat Ganondorf's stage in Extreme Labyrinth
 * Scan a Ganondorf amiibo

Marshadow

 * Play 140 matches
 * Beat Marshadow's stage in Extreme Labyrinth
 * Scan a Marshadow amiibo

Bomberman

 * Play 150 matches
 * Clear Classic Mode in under 15 minutes
 * Beat Bomberman's stage in Extreme Labyrinth
 * Scan a Bomberman amiibo

Chorus Men

 * Play 160 matches
 * Beat Chorus Men's stage in Extreme Labyrinth
 * Scan a Chorus Men amiibo

Duck Hunt

 * Play 170 matches
 * Beat Duck Hunt's stage in Extreme Labyrinth
 * Scan a Duck Hunt amiibo

Wolf

 * Play 180 matches
 * Beat Wolf's stage in Extreme Labyrinth
 * Scan a Wolf amiibo

Sylux

 * Play 190 matches
 * Beat Sylux's stage in Extreme Labyrinth
 * Scan a Sylux amiibo

Cloud

 * Play 200 matches
 * Defeat Master of Craziness after one phase
 * Beat Cloud's stage in Extreme Labyrinth
 * Scan a Cloud amiibo

Geno

 * Play 210 matches
 * Clear Century Smash
 * Beat Geno's stage in Extreme Labyrinth
 * Scan a Geno amiibo

Elma

 * Play 220 matches
 * Beat Elma's stage in Extreme Labyrinth
 * Scan an Elma amiibo

Impa

 * Play 230 matches
 * Beat Impa's stage in Extreme Labyrinth
 * Scan an Impa amiibo

Mewtwo

 * Play 240 matches
 * Beat Mewtwo's stage in Extreme Labyrinth
 * Scan a Mewtwo amiibo

Pac-Man

 * Play 250 matches
 * Defeat Master of Craziness after two phases
 * Beat Pac-Man's stage in Extreme Labyrinth
 * Scan a Pac-Man/Ms. Pac-Man amiibo

Leon

 * Play 260 matches
 * Beat Leon's stage in Extreme Labyrinth
 * Scan a Leon amiibo

Bayonetta

 * Play 270 matches
 * Clear Century Smash with 10 characters
 * Beat Bayonetta's stage in Extreme Labyrinth
 * Scan a Bayonetta amiibo

Ridley

 * Play 280 matches
 * Defeat 4 bosses (not including Master Hand, Crazy Hand, Master of Craziness, or Labrain)
 * Beat Ridley's stage in Extreme Labyrinth
 * Scan a Ridley amiibo

Mr. Game & Watch

 * Play 290 matches
 * Collect 544 trophies
 * Beat Mr. Game & Watch's stage in Extreme Labyrinth
 * Scan a Mr. Game & Watch amiibo

Phoenix

 * Play 300 matches
 * Defeat Master of Craziness after three phases
 * Beat Phoenix's stage in Extreme Labyrinth
 * Scan a Phoenix amiibo

Bowser's Castle

 * TBD

Buoy Base Galaxy

 * TBD

Castle Nox

 * TBD

Corneria

 * TBD

Courtroom

 * Win 25 standard matches as Phoenix.

Death Mountain

 * TBD

Duck Season

 * Get a score of 20 in Rival Smash as Duck Hunt.

Flat Zone X

 * Win 25 standard matches as Mr. Game & Watch.

Meeting Place

 * TBD

Megami Tensei

 * TBD

Mt. Silver

 * TBD

Mute City

 * Clear 10 tickets in Master Orders.

New Pork City

 * Clear Crazy Orders after 5 turns.

Spear Pillar

 * TBD