Not sure how much this helps, but here goes nothing:

Awesome list, but I agree with rol here.

There shouldn't be a cut date. It should be all games released in its final year until... well, forever.

You forgot Kirby's Dream Collection on the Wii list.

Actually, looking at these, the support is better than us fanboys usually give credit for. However, BIG games rarely appear in this timeframe.

To Viper1's point about the Wii being around a year longer making support harder, when you look at what NoE has done, you realize that's simply not true at all. PAL has all the above plus The Last Story, Pandora's Towers, Fatal Frame (Project Zero) II, Inuzema Eleven Strikers

True but when you are considering localization, you get a lot of gray area.  I mean, NOE could hold onto a bunch of games and then localize them all in the last year and you'd have to call that good support based on the criteria.

I think a better criteria should be games that had their development completed in that 18 month window.  

N64>SNES>Wii
you forgot about Conkers BFD

It turns out Conker was published by Rare. Came as a surprise to me.

O:
and what about DK64?

That came out in 1999 if I recall properly. But probably published by Nintendo.

Man, how great was Rare between 1994 and 2001? There will probably never be a better run of quality titles from a second-party developer.

so true
i really miss those days *-*

Maybe I'm wrong, but I think you should add Poké Park 2 and Mystery Case Files 2 to your list for the Wii. If I remember correctly, they both were published by Nintendo during the timeframe you mentionned.