User blog comment:PlantyThePottedPlant/Random Topic Blogging III: Blog Harder/@comment-3473686-20130503224010/@comment-1518158-20130503224245

Version-exclusive Pokémon!

http://bulbapedia.bulbagarden.net/wiki/Pok%C3%A9mon_FireRed_and_LeafGreen_Versions#Version_exclusives