the best video wii can output is through component, unfortunately.
no clue on the other questions, but the wii does have SMG1 and 2, DKCR, RE4 Wii, Brawl, Muramasa, Metroid Prime 1-3, and a handful of other great games worth checking out.
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XS2 is the only good Xenosaga game - Lady Ashe
http://backloggery.com/cwistofu