Yes, after beating the Elite Four, they will be roaming Kanto.
You can get Pokemon from the Honnen and Kanto region, and after beating the Elite Four you can get certain GSC Pokemon.
ya u can trade Pokemon in blue before u beat the elite four.
You finish the game by beating the Elite Four. If you beat that try to get all the Pokemon from firered, leafgreen, emerald, sapphire, ruby, and pearl.
you have to start with charmander, and suicune roams the region after beating the elite four
You must defeat the elite four and the Pokemon champion then catch all the Pokemon which is only possible with help from friends.
Finish your Pokedex And Beat The Elite Four once then the second time they have stronger Pokemon
By beating the elite for then Beating the champion.
in what game of Pokemon
I think it's finish
FAP
Beat them and the champion