シンオウのいし - Evolution Item
シンオウ地方で初めて発見された、ある特定のポケモンを進化させる特別ないし。とても堅くて美しく輝いている。
Special evolution items like the シンオウのいし first arrived back with the second generation of Pokémon, and are now required when evolving Pokémon such as ベロベルト and ドサイドン and モジャンボ and エレキブル and ブーバーン and トゲキッス and エテボース and メガヤンマ and ドンカラス and ムウマージ and グライオン and マニューラ and マンムー and ポリゴンＺ and エルレイド and ロズレイド and ヨノワール and ユキメノコ. When evolving these Pokémon, this item is required in addition to the candy, and is consumed when used.
How to get the シンオウのいし
The シンオウのいし is obtained from spinning Pokestops and Gyms. There is a very low drop chance of around 1% per spin to receive a シンオウのいし or any of the other evolution item, and there is an equal chance of obtaining each of the 5 currently available items.
There's no way to ensure that the シンオウのいし will drop, but with only 4 other items, there's a greater than 50% chance that you'll receive one once you've spun over 250 Pokéstops.
The 7th day streak bonus gives you a very high chance of obtaining one of the evolution item, but it's not believed to be guaranteed.
Other evolution items
The other evolution items that can be found in Pokemon GO are: