Legendary Pokemon Regice will be available in Pokemon Go starting today.
According to Pokemon Go’s official site, Regice will begin spawning in raids today and will remain in the game until 1:00 PM Pacific Time on July 19. Regice will be followed by Legendary Pokemon Regirock and Registeel later this summer.
Regice is the sixth Legendary Pokemon to appear from generation 3, following Groudon, Kyogre, Rayquaza, and Latios and Latias in the last few months. Once Regice, Regirock and Registeel are all released, this will mean every Legendary Pokemon from generation three has been added to Pokemon Go, though the game has yet to add Mythical Pokemon Deoxys.
Source: IGN.com Pokemon Go: Legendary Pokemon Regice Available Today