you need to look in his breifcase and choose a Pokemon :)
Athis lab in Litleroot P.S.I need help catching Latias/Latios
OMG!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! YOU MUST HELP PROFFESOR BIRCH
RUBY VERSION?If you mean on ruby version, the moving truck goes after you go and help professor birch when he gets chased by a dog Pokemon at the start.
Pokemon with Arena trap this will help: http://www.serebii.net/abilitydex/arenatrap.shtml
Go to route 101 and help the professor from Poochyena.
It's easy, help Professor Birch and choose the Pokemon you like, he have three types of Pokemon, it is: Torchic, Mudkip and Treeko. When you are battling with the Zigzagoon keep on using tackle.
YOU NEED TO FIGHT ALL POKEMON AND YOU WILL COMPLETE THE POKEDEX. AND THAT WILL HELP YOU TO GET THE NATIONAL POKEDEX BY TALKIN TO PROFESSOR OAK.
You get to help: Cynthia the Pokemon league champion dawn professor rowan's intern TV producers your friend people that write articles
from prof. birch yea but how?when i talk to him he didnt get it to me what do i have to do so he will give it to me?PLZ I NEED HELP TO and why they say Pokemon is for 3+?i say it is for 20+ xD
He gives you a poke radar to help you find or avoid pokemon. hope this helped!
No, it's not. In sapphire/ruby , when you complete your pokedex the only thing you get is a star in the Trainer Card and prof Birch will only say "Congratulations " or a thing like that. That "rumor" is half true , but not in sapphire/ruby. In Emerald when you complete your pokedex prof birch will give you to choose one of the silver/gold starters and some Pokemon from that versions will appear so you can caught them. Hope this answer will help you ^^
You cannot battle Professor Elm. He is there to help you out. He prefers to research than battle.