A hunting license is a card that allows the purchase of certain rare items and reduces shop prices. It is found at the Galaxy Corporation for hunter coins, more coins for higher rank.(a license is not needed to go on hunts or call in points.
For silver license, 20 hunter coins.
For gold license, 40 hunter coins.
For platinum license, 60 hunter coins.
Unfortunately, it is not possible to just get 60 coins and go straight to the platinum license. to get it, a total of 120 coins must be gathered.
To exchange coins for a card, you must talk to MIO at the Galaxy Corporation. Coins are obtained by doing challenges or defeating Mimics.