Pokemon is not just big, it's old. And the Pokemon creators had a really great idea at one point. Instead of just making a slippery slope of new games (that could easily become increasingly worse) why not just remake the old titles?
As I said before, I came in on Pokemon Ruby/Sapphire versions, so I didn't know much about Pokemon Red/Blue or Pokemon Gold/Silver. Well now I've got a better idea, because I've played the remakes!