If u mean the amulet coin after u get 40 kinds of Pokemon on your pokedex professor oaks aide gives it to you in the building on route 16.
You can find the Amulet Coin on Route 16.
You can only get one coin case.
An oak aide in the big building west of celadon city has amulet coin.
the coin thing says e1
the GameCorner is i Celadon City. South of Pokemon Center.
Only simple easy way is to get an coin amulet an fight trainers.
In celadon city at the eating place talk to a guy
It's given by Prof. Oak's aide on Route 16.
u could find it in a house in celedon city
Celadon city in the diner, there's a guy eatting that you talk to who gives it to you
if you give me aflat screen tv mcdonalds and a hot boyfriend i will tell you
when u have 50 pokemon go to one of the proffesors aids and he will give you