I don't really know what is the point in catching the pokemon other then they are rare. I can see possible potential in the game if you are able to do something with the pokemon you caught or explain how to catch pokemon better. It would also be nice to have some animation and variety in NPC for all the guys look the same including the player. Also I would make it tile based movement for the original pokemon games were tile based. Lastly you should have a "Pokemon Counter" where instead of saying how many of each pokemon you have in dialogue have a list that shows up showing the name and then next to it the amount of them you caught.