I have caught the 150 original Pokemon myself and all I got was some praise from Oak, but if you are talking about all on the national Pokedex, then I have no idea!
nothing
Catch 'em all
All starters, including Bulbasaur, can't be caught in Pokemon LeafGreen.
Nothing happens, except the fact that you have many Unowns. ~Katie
you can catch water Pokemon by surfing on water and by using all the rods
The Tanoby Chambers open up so you can catch all the Unowns.
Here is the answer to your questionYou can catch all Pokemon on leafgreen by using Pokeballs to catch them after you battle them. Why don't you not be lazy and just catch them for yourself instead of using cheat codes when you do not feel like catching them.
Trade, Train, Evolve, Catch, Breed all the pokemon!
Catch all the Pokemon. credits are rolled if you beat the Pokemon league
Nothing
You have to catch 6o diffrent Pokemon... (good luck)
Nothing, really.