You would get a depoma for getting all the Pokemon
No!
First you got to catch him in Pokemon leafgreen or fire red and trade. Or you can use a gameshark. it lets you catch all the Pokemon from bulbasaur to deoxys.
I dont know what happen in diamond, but in platinum you can catch ! and ? unowns.
get all three dogs then talk to oak
you have beaten the game and that's it.
the fun of having them i guess
nothing will happen. you have to catch all the Pokemon to get something. you will get one of the johto starter Pokemon. YOUR WELCOME
A diploma is something professor oak gives you when u catch all the Pokemon in fire red
You have to trade them from fire red AND leaf green cuz you can't catch them all on either one. You also can't catch them on emerald.
You only need to see them but you have to catch at least 60 Pokemon to get the national dex
if your talkin fire red you get one of the older starters like tododile!
493 Pokemon all together, however to catch them all you will need to attend Pokemon events, and have Pokemon fire red/ leaf green, diamond, ruby/sapphire/emerald.