Muramasa: The Demon Blade and Silent Hill: Shattered Memories are some other "hidden gems" for the Wii.
The former combines gorgeous hand-painted artwork with a hack 'n' slash Metroidvania, while the latter has some of the best storytelling, atmosphere, and use of motion controls on the system.
I know Silent Hill: Shattered Memories is a reimagination of the first SH, but how different are they to each other, what do you think? Because we have replayed the first SH on PS1 just recently. Maybe we should give Shattered Memories a look.
Gameplay > Graphics
Substance > Style
Art Direction > Realism