In the Team Rocket HQ hideout under the souvenir shop, there are trapped pokemons on the far west side of the map.
Pretty sure these are meant to be catch-able. At least I remember catching them in the original silver and gold.
http://i.imgur.com/M1uGKqO.png
Pretty sure these are meant to be catch-able. At least I remember catching them in the original silver and gold.
http://i.imgur.com/M1uGKqO.png