I want a time-consuming Wii game that's good.

[scottie]

RE:4 is a very good game, and has alot of replayability/extra features
Brawl and MK Are also good for racking up hours

Damn, others have beaten me to those recommendations

Geometry Wars: Galaxies
Blastworks: Build, Trade and Destroy/Blastworks: Build, Fuse and Destroy depending on your region