I've just been reading about Pokemon Snap and wishing for a sequel. I remember when I got the first Pokemon movie on video, it had an advert with pretty much every Pokemon game out at the time (Puzzle League, Yellow etc.) and Snap looked like the coolest thing ever. I only eventually got to play it many years later when they put it on the Wii store, but it was just as fun as I expected it to be.
I can't believe it hasn't had a sequel to be honest, especially when you consider some of the crappy spin-offs that have got sequels. *cough*PokemonRanger*cough*
I think Pokemon models look brilliant in home console games (e.g. Battle Revolution) and it would be a major attraction to the Wii U to release a sequel.
On a side note..