It's one of them. It also happens to be a very good game.

I think that Metroid Prime Corruption 3 is a game with fantastic graphics that hasn't been mentioned.

Honestly, I was never all that impressed by SSBB. I mean, I can see why others find it impressive (Good character models, optional AA, Havok physics, 60fps) but the environments rarely wowed me. It looks good, but not "one of the best on the system" material to my eyes. (Skyward Sword too)

I second metroid Prime 3 as a looker though, that game still looks great nearly 5 years on.

Super Mario galaxy 1 and 2 followed by DKCR, that game just has very varied and detailed designs also its beatifully animated.

It does looks good, so Mario Galaxy 2. To me the most beatiful game was Xenoblade and Resident Evil Darkside Chronicles.
Altough to be fair, that game was mostly CGI but they were really stunning

i was never really impressed by sonic colours' graphics. the first two levels look really great but i found some of the later levels uninspired and not really impressive. I think the two sonic games from the storybook team looked way better if you keep in mind their earlier launch.

In my opinon the best looking games on wii are obviously Super Mario Galaxy 2, Resident Evil: Darkside Chronicles, Silent Hill: Shattered Memories (very good light effects on this one) and Xenoblade Chronicles (mainly for the massive scale of the worlds).

I wouldn't say it's the graphics king of the Wii, but it is up high on the list.

How was RE:DC mostly CGI? Yeah, it has some very pretty CG sequences, but they didn't outnumber the in-game segments, which were themselves very impressive. I swear that game almost looks SD 360 at points.

Funnily enough, I'd say the opposite, that Secret Rings and Black Knight were less consistent and Colour more polished. I don't recall any moments in Colours that struck me as unimpressive.

Galaxy 2 wins

Donkey Kong Country Returns, imo.

Well i remember being very heavy on CG sequences, but that was a long time ago, so I might be wrong here. Either way the game was really impressive, in-game and cutscenes