From GameDev Academy: "In the last tutorial we added the Trainer and different Pokemon species to our game. Now we are going to limit the number of pokeballs for the player, and add different types of pokeball with different catching rates. To get new pokeballs the player will have to interact with pokestops. The following topics will be covered in this tutorial:
- Limiting the number of pokeballs
- Adding different types of pokeball with different catching rates
- Adding pokestops where the player can collect pokeballs
- Adding a title screen"