Onslaught (Wiiware):
http://www.metacritic.com/game/wii/onslaught - 10 reviews
Dewy's Adventure:
http://www.metacritic.com/game/wii/dewys-adventure - 29 reviews
Art of Balance (wiiware):
http://www.metacritic.com/game/wii/art-of-balance 10 reviews
Harvest Moon: Animal Parade:
http://www.metacritic.com/game/wii/harvest-moon-animal-parade 10 reviews
Games I listed:
Fishing Resort:
http://www.metacritic.com/game/wii/fishing-resort - 9 reviews
Kororinpa:
http://www.metacritic.com/game/wii/marble-saga-kororinpa - 15 reviews
Trackmania:
http://www.metacritic.com/game/wii/trackmania-build-to-race - 17 reviews
Calling:
http://www.metacritic.com/game/wii/calling - 26 reviews
Sakura Wars:
http://www.metacritic.com/game/wii/sakura-wars-so-long-my-love - 30 reviews
Gravity:
http://www.metacritic.com/game/wii/professor-heinz-wolffs-gravity - 12 Reviews
Ivy the Kiwi:
http://www.metacritic.com/game/wii/ivy-the-kiwi - 30 reviews
Ghostbusters (Wii version)
http://www.metacritic.com/game/wii/ghostbusters-the-video-game - 29 reviews
Sam & Max: Beyond Time and Space
http://www.metacritic.com/game/wii/sam-max-beyond-time-and-space - 5 reviews
Prince of Persia: The Forgotten Sands (Wii version)
http://www.metacritic.com/game/wii/prince-of-persia-the-forgotten-sands - 24 reviews
Tomb Raider: Anniversary (Wii version)
http://www.metacritic.com/game/wii/tomb-raider-anniversary - 22 reviews
Broken Sword:
http://www.metacritic.com/game/wii/broken-sword-shadow-of-the-templars-the-directors-cut - 29 reviews
As you can see all about the same as Dewy's Adventure or less. Some others I listed were higher (30's) but none extremely well covered. I guess you didn't realize Dewy was marketed and covered in it's day. So was the original Kororinpa (39 reviews!)
10 reviews for a Wiiware title is actually quite a lot making Onslaught and Art of Balance high as far as wiiware goes. Most WW titles have no Metacritic review score because there's not even four reviews (often not even one)
