Hello BlackBlizzardz, Try following these steps: 1. Place the stone in slot 9 of your hotbar 2. Exit your inventory and scroll to slot9. (So that the stone is in your minecraft hand) 3. Right click the stone. At this point a window should pop up and you should be able to select the Pokemon you wish to use the stone one. I hope this helps! If you have any other questions feel free to message me on discord or on the forums!