Gold and Silver Version
Here are some screenshots from the Japanese Gold and Silver Version.
Gold and Silver has more than just 150 Pokemon! It has up to 260 Pokemon... meaning 110 more Pokemon!!! The graphics are better, you can choose to be a guy or a gal in the game, your rival's not Gary, more cities, you can catch Charmander, Squirtle, and Bulbasaur... WHAT COULD BE BETTER?! I don't think you can expect more from GB graphics! Love it or hate it, you have to admit that it is the best game that you can find in Pokemon GB.