Update #2: And here's the full roster! The final character is unlocked after 70 versus matches (which can be lost by simply walking off the screen, thereby advancing the counter).

Row 1:

Mario

Luigi

Peach

Bowser

Yoshi

Rosalina

Bowser Jr.

Wario

Mr. Game and Watch

Row 2:

Donkey Kong

Diddy Kong

Link

Zelda

Sheik

Ganondorf

Toon Link

Samus

Zero Suit Samus

Row 3:

Pit

Palutena

Marth

Ike

Robin

Kirby

King Dedede

Meta Knight

Little Mac

Row 4:

Fox

Falco

Pikachu

Charizard

Lucario

Jigglypuff

Greninja

Duck Hunt Dog

R.O.B.

Row 5:

Ness

Captain Falcon

Villager

Olimar and Pikmin

Wii Fit Trainer

Dr. Mario

Dark Pit

Lucina

Row 6:

Shulk

Pac-Man

Mega Man

Sonic

Mii Fighters

Unlocking all the characters also gives you access to "True All-Star mode," customizable profile icons, and Kirby's copy sounds in the Sound Test area.

Update: Streamer Gema_Yue is still going! There are more character unlocks, as you can see below.

Original Story:

With Super Smash Bros. out in Japan (for 3DS) in just a couple of days, streamers on Twitch have been outing the hidden characters. If you don’t want to know who they are, turn back now. Otherwise, prepare for a final smash level spoiler bomb.

Based on the streams of two gamers from Asian territories, Yushako and Hamayama, here’s who you can bring to the fight when we get our hands on the game.

The snickering Duck Hunt Dog is included (which isn’t a big surprise after the leaks last month). Additionally, Ganondorf, Dr. Mario, a dark version of Pit, Mr. Game and Watch, Ness, and Falco are included.

On another stream, Twitch user Gema_Yue shows off his unlocks, which include Wario.

You can check out archived videos of the streams at the links below. For more on Super Smash Bros. 3DS, which is out in North America on October 3, check out our previous coverage.

[Source: Yushako, Hamayama, Gema_Yue via Joystiq]