GameCube

Super Paper Mario - August 3rd 2006
donkey kong Bongo Blast - August 10th 2006
Kirby (tentative name) - 2006
The Legend of Zelda (tentative name) - 2006
Eyeshield 21 (tentative name) - undecided
Geist (tentative name) - undecided

Wii

Disaster: Day of Crisis (tentative name) - undecided
Excite Truck (tentative name) - undecided
The Legend of Zelda: Twilight Princess (tentative name) - undecided
WarioWare: Smooth Moves (tentative name) - undecided
Fire Emblem (tentative name) - undecided
Metroid Prime 3: Corruption (tentative name) - undecided
Project H.A.M.M.E.R. (tentative name) - undecided
Super Mario Galaxy (tentative name) - undecided
Wii Sports (tentative name) - undecided

Gameboy Advance

bit Generations dotstream - July 13th 2006
bit Generations BOUNDISH - July 13th 2006
bit Generations DIALHEX - July 13th 2006
bit Generations COLORIS - July 27th 2006
bit Generations DIGIDRIVE - July 27th 2006
bit Generations ORBITAL - July 27th 2006
bit Generations Soundvoyager - July 27th 2006
Rhythm Kingdom - August 3rd 2006

Nintendo DS

Metroid Prime Hunters - June 1st 2006
Magical Vacation 2 - June 22nd 2006
Project Hacker - July 13th 2006
You Talk! DS Cooking Nabi - July 20th 2006
Mario Basketball 3 on 3 - July 27th 2006
Star Fox Command - August 3rd 2006
Pokémon Diamond - this fall
Pokémon Pearl - this fall
JUMP SUPER STARS 2 (the tentative name) - this winter
Wishroom (Hotel Dusk) (tentative name) - 2006
Custom Robo DS (tentative name) - 2006
Tingle RPG (tentative name) - 2006
Wario Mysterious Thief (tentative name) - 2006
ARCHAIC SEALED HEAT - 2006
Kanji Writing Training (tentative name) - undecided
DS AIR (tentative name) - undecided
Kirby DS (tentative name) - undecided
Legend of Zelda (tentative name) - undecided
Chibi Robo! DS (tentative name) - undecided
Donkey Kong King of Swing DS (tentative name) - undecided
Mario vs. Donkey Kong DS (tentative name) - undecided
Yoshi's Island 2 (tentative name) - undecided

Source