Somewhere in erecutek city there is a house with a guy inside near a map he will ask if you like treasure hunting say yes and you get the itemfinder.
I'm sorry but itemfinder only finds items not Pokemon wish it would
Just find the itemfinder press A and select 'use' then you're using it!
use the itemfinder and you can find plenty.
Youuse it to find hidden items.
Use the itemfinder then press A.
use the itemfinder and you will eventually find a lot
There are multiple items that you can find, a list, however, is currently not available.
Use the itemfinder then start pressing A everywhere.
In Pokemon Crystal.
Find the oak aide that gives you the itemfinder which should be in the big building east of vermilion city he will ask if you have recorded 30 Pokemon in your pokedex if you did say Yes he will give you the itemfinder.
You can't buy them, but you can find them in pokeballs and on the ground, using the itemfinder
Pokemon emerald