So I think I've got every Wii game Ill want to play, but before I put my Wii collection to rest I figured I'd see if there are any must play games that I'm missing out on.  Here's what I have so far:

Xenoblade Chronicles

Pandora's Tower

The Last Story

Okami

The Legend of Zelda Skyward Sword

The Legend of Zelda Twilight Princess

Kirby's Dream Collection

Kirby's Return To Dreamland 

Kirby's Epic Yarn

Metroid Prime 3

Metroid Other M

Super Mario Galaxy

Super Mario Galaxy 2

New Super Mario Bros Wii

Mario Kart Wii

Sonic Colors

Pikmin 2

Donkey Kong Country Returns

Sin & Punishment Star Successor

Super Paper Mario

Super Smash Bros Brawl

Edit: I want to have Metroid Trilogy and FE Radient Dawn, but they are too expensive so I gave up on them.

rhythm Heaven

http://en.wikipedia.org/wiki/Rhythm_Heaven_Fever

Monster Hunter Tri
Silent Hill Shattered Memories
Little King's Story
Project Zero 2: Wii Edition
Fatal Frame 4
Red Steel 2
No More Heroes
No More Heroes 2
Tatsunoko vs Capcom

Don't give up on some of the best games on Wii mate. Owning these two games is like owning Chrono Trigger and Super Metroid on Super Nintendo. They'll still hold their value many many years after release. Just save up and get one at a time. Who knows? What if Metroid Prime Trilogy (Steelbook Version) goes for $150 in the future? Chrono Trigger was worth about $30 on SNES in 2009 when I bought it. Now it's worth $75+ on eBay. It's rewarding owning rare games. Especially more recent ones. Hope you get them soon. :)

btw, I also recommend getting Pikmin 1 on Wii.  Pretty rare game. About $35. As well as DK Jungle Beat New Play Control. $30-35 as well. 

Ninjabread Man puts all other Wii games to shame!

Resident Evil 4 Wii Edition

Pikmin 1 and 2 if you don't have them on GC

I also like Trauma Center

But it falls so tragically far short of the masterpiece that is Leisure Suit Larry: Box Office Bust on PS3/360/PC. Poor Wii, how could it ever compete that High Definition classic? :p

Trauma Center: New Blood. Play it.

It's a game based on surgery, but the surgery is actually more like arcadey action. It's the one game I can safely say is much better because of the Wii Mote. It's also quite a challenge. I highly recommend it.

Only one game can compete with the high standard Leisure Suit Larry displayed on the HD platforms.

And that is:

Major Minor's Majestic March

aka 

The game of the generation.

Do you accept defeat in our battle of wits? Or do you have a better hidden gem? :D

Is it actually the surpior version?  I don't have any version of RE4 yet, but I want to play it eventually.  I kept hearing about the Wii version of Okami being the best, but the brush mechanics were really glitchy for me.