"My idea for Master Ball"

#PokemonGO: After completing a Raid, if you have any left over Premier Balls, they will be held in Item Storage. They cannot be used for catching Wild Pokemon, or in any future Raids. A maximum of 100 Premier Balls can be held at any given time. Once accumulated 100 Premier Balls, head to a Gym where a Raid is currently active, touch the photo disc. There will be a button which you can then convert your 100 Premier Balls into 1 Master Ball. Only 1 Master Ball can be held at any given time. Can be used on both wild and Raid Pokemon. Only one of each species can be caught using a Master Ball, to prevent users from abusing them on one certain species of Pokemon. via /r/pokemongo http://ift.tt/2AqH7QH