In my opinion the Latis are the rarest and hardest to find and capture in sapphire version. In Emerald I would say it is Deoxys because you need to go on the spaceship when the guy says 100 flights.
a surskit
mew2 is the rarest
kyorge
the rarest Pokemon in Ruby Sapphire and Emerald is Feebas
i think all of the legendary Pokemon in that game or someting
Rayquaza,kyogre and groundon are second rarest!hope it helps! ^_^p.s.obviously Pokemon you cant get on sapphire,but can on other gba games E.G....chikorita, are the rarest! "_"
i never played Pokemon fire red but the rarest Pokemon IN fire red is obviously mew ... who ever wrote that is an idiot ... the rarest Pokemon is mewtwo ... mew can not be obtained in fire red ... and you get mew two by getting the ruby and Sapphire and then you go to cerlean cave to get mew two after u have completed the E4 and have gotten the ruby and Sapphire ... i hoped i helped
If you have Sapphire, it's Latias. If you have Ruby, it's Latios. And if you have Emerald, you get to choose.
Not including the legendaries and special pokemon ( ones that you can only catch once ) feebas is the hardest and rarest pokemon to catch
I know in Sapphire it was REALLY hard to find Feebas (Milotic's basic stage).
well it is either mewtwo or entai/raikou/soucuin and no for leaf but yes to emerald
I haven't catch these Pokemon yet: - Nosepass - Feebas - Chimecho They all rare, so of you ask what is the rarest Pokemon, I can't answer it. But if you ask what is the rare Pokemon, my answer is above
The rarest Pokemon is Dialga