https://www.polygon.com/2017/8/31/16232982/pokemon-go-entei-suicune-raikou-legendary-pokemon

Surprise: There’s a new set of legendary Pokémon now live in Pokémon Go. The roving legendary dogs of Johto — Entei, Suicune and Raikou — can now be found in Raid Battles worldwide.

From today, Aug. 31, until Sept. 30, players will be able to find one of the three Pokémon on different continents. Here’s the list for which dog you can find where: