You are Travelling Through The Region of Sinnoh, When you Notice a Small Shop Opened nearby, as you approach it. An Eevee, Wearing a Tophat, and a Suit. Seems to be Operating the Shop.

Vee-Vee! Hello there, Costumer! Welcome to the Eevee-Shop! Here, you can Buy Any Evolution Stone, In Exchange for Eevee-Tokens. How do you Get Eevee-Tokens? You may ask. In Order to Get Eevee-Tokens, you must Capture Eevee's for a Low chance of a Random amount Dropping from them.

The Shopkeeper smiles.