By action replay or events that that come rarely
You can get the Item finder from Professor Oaks in Pokemon LeafGreen. Professor Oaks is found on route 11 just out side of Vermillion City.
No.
i done this for the crack of it :D
Samuel
The Kant Region Pokemon Professer
one of professor oaks aides gives it to you
You have to get Oaks letter an a special day and go to victory road then to the ocean and professor oak will be there with a rock and shaymin will appear.
that was an event to get shaymin! i dont think you can get it the only way to get oaks letter is from an AR code
Its in Pallet Town in Kanto
only with a event
Professor Oak's lab is Pallet Town. - Conoogle