WiiNintendo

Note: According to Nintendo, 500 studios have received a Wii kit by far.

Total Known Third-Party Count = 104

A2M
Activision
Amaze Entertainment
AGFRAG
AQ Interactive
ASNetworks
Artdink
Atari
Atlus
Backbone Entertainment
BANPRESTO
Barking Lizards
Blitz Games
Buena Vista Games
Capcom
Cellien Studios
Cing
Codemasters
Compile Heart
Conspiracy Entertainment
Coresoft
Crossbeam Studios
D3Publisher
Day 1
Edge of Reality
eGames
Eidos
Electronic Arts
Eko
Emerging Entertainment
EPOCH
Epyx
From Yellow to Orange
From Software
Gearbox Software
Genki
Grand Prix Games
Grasshopper
High Voltage
Hudson
Ignition Entertainment
Interactive Brains
Interchannel-Holon
IR Gurus
JALECO
Koei
Konami / Kojima Studios
Krome Studios

List continues:

Left Field Productions
Lucasarts
Majesco
Marvelous Interactive / Natsume
Mastiff
Matsuno – Unknown Studio Name
Midway Games
Milestone
MTO
Namco Bandai
Nippon Ichi
Nissimo
Neko Entertainment
NIBRIS
oeFun, Inc
Page 44
Papaya Studios
Pipeworks Software
Planet Moon Studios
Pronto Games
Pyro Studios
Raven Software
Red Tribe
Route24
SEGA
Sensory Sweep
Shiny Entertainment
Smart Bomb Interactive
SNK
Spike
Square Enix
Starfish SD
Stormfront Studios
Success
Taito
Take-Two / Rockstar Games
Tecmo
Telltale Games
Terminal Reality
The Game Factor
THQ
TOMY
Torus
Totally Games
Tuna Technologies
Twelve Interactive
Ubisoft
Vicious Cycle
Viracious Visions
Virtual Toys
Vivendi Universal Games, Sierra Online
Warner Bros. Interactive
Wayforward
Wideload Games
Yukes
Zoonami

Note: Three or four companies have not confirmed a Publisher. In addition to third-party development for the Wii, eight other companies that are not listed have confirmed development for the Virtual Console. They are: Chunsoft, D4 Enterprise, Irem, NCS Masaya, Netfarm, Paon, Rocket Company and Sunsoft.

Source

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