Oh, I know plenty.
You may enjoy both Pikmin games because they've been updated to feature good, waggle-free controls and slightly better visuals plus true widescreen.
The same can be said for the Resident Evil remake and Resident Evil 0 since they no longer take up two small discs and have Gamecube controller support.
Mario Galaxy 2
New Super Mario Bros Wii
Goldeneye 007 remake(a graphically superior game IS on PS3 and 360, but I like the Wiimote controls on this one)
If you can get your hand on it, the Metroid Pirme Trilogy disc
Xenoblade Chronicles (rpg)
The Last Story (rpg)
Pandora's Tower (if you're in the UK)
Arc Rise Fantasia (rpg)
Tales of Symphonia: Dawn of the New World (rpg)
Rune Factory: Frontier (rpg, sim)
Rune Factory: Tides of Destiny (technically not exclusive (also for PS3) but it was made for Wii)
Muramasa: The Demon Blade
Sonic Colors
Zelda: Skyward Sword
Kirby Epic Yarn
Kirby: Return to Dreamland
Kirby 20th Anniversary Collection (WAAAAY better than the Mario All Stars rerelease)
Donkey Kong Country Returns
Boom Blox and its sequel
Prince of Persia: Forgotten Sands (I like Wii version's story and gameplay better than the PS3/360 version)
Wario Ware: Smooth Moves
Wario Ware: Shake it!
The Conduit (sequel wasn't too great, imo)
Dead Space Extraction (unexpectedly good, and has more features than the PS3 rerelease)
Dragon's Lair Trilogy, if you like Don Bluth animation
I'd say Monster Hunter Tri, but it's getting an updated 3DS and Wii U rerelease.
Fragile Dreams
Sin and Punishment: Star Successor
Super Paper Mario
Red Steel 2 (needs Wii Motion Plus, but overall better than first)
Cursed Mountain
Madworld
De Blob and De Blob 2 (2 is not exclusive, but still better than 1)
A Boy and His Blob
Epic Mickey (2 was on both Wii and Wii U, and I don't know good it is yet)
Tatsunoko vs Capcom
The King of Fighters and Samurai Shodown collections
Metal Slug Anthology (PS2 version has a better controller, but horrendous load times)
Fire Emblem: Radiant Dawn
Klonoa Wii-make
Little King Story
Shiren the Wanderer
Punch-Out! Wii-make
Trauma Team (best of the series, imo)
Geometry Wars Galaxy (again, best of the series, imo)
Mercury Meltdown: Revolution
Fishing Resort (surprisingly good)
Go Vacation (ditto)
Bit Trip Complete (all the games, plus more, on one disc)
And that's probably all the best ones that you do not have. As you may be able to guess, I took a long look into Wii games that slipped under the radar that were actually very fun. Not many of them are as grand or epic as some of the ones on PS3/360, but there are plenty of good games available.