You get the national pokedex and a jhoto starter.
you get a ribbon.
Trade, Train, Evolve, Breed.
1. complet pokedex. 2. Beat elite 4. 3. talk to prof. britch. 4. get national pokedex.
the kanto pokedex YES national not sure but i think you have to trade from ruby or sapphire or something
nothing
catch all the Pokemon, some Pokemon will need to be caught on Sapphire and traded.
Emerald.
nothing really you get a gameshark certificate saying you have completed it and when you complete the hoenn dex you get cyndaquil, totodile and what ever its called
You cant get a kanto starter on Pokemon sapphire but if you have Pokemon emerald then you complete the pokedex then you get a choice of starters from the johto region. I hope this helped.:)
Complete your normal pokedex first, and then go to professer birch and he'll give you one
As with all the other Pokemon games, he shows you a little certificate and doesn't give you anything I think.