I'm not very good with genres, so please don't just take my word for it. A lot of these titles are probably not really "adventure" games... but they are all pretty fun.
Wii:
A Boy and his Blob
Dead Space Extraction
Deadly Creatures
Ghostbusters: The Video Game
Klonoa
Little King's Story
Muramasa
Okami
The Godfather: Blackhand Edition
Scarface: The World is Yours
GameCube:
Alien Hominid (tough as nails though!)
Eternal Darkness
Gun
James Bond 007: Everything or Nothing
Metal Arms: Glitch in the System
Starfox Adventures
The Legend of Zelda: Windwaker
noiseredux wrote:... Gamecube + Game Boy Player = best console of all time.
Recently picked up a Game Boy Player at GameStop for $10. The cashier couldn't understand why I was so excited.
My GB Micro lets me play GBA games on the move, but sacrificed backwards compatibility. Now I'll have a (cheap) way to replay older GB/GBC classics at home anytime. Finishing Mother 3 on a bigger screen is just the cherry on top. Let the Game Boy thrift shopping begin!