Giratina comes to Pokémon GO Raid Battles this Thursday, March 28

The Renegade PokémonGiratina, is officially returning to Pokémon GO Raid Battles. This Ghost- and Dragon-type Legendary Pokémon, originally discovered in the Sinnoh region, will once again emerge from the Distortion World from March 28 at 1 p.m. PST to April 2 at 1 p.m. PST. Origin Forme Giratina will then start to appear until April 29 at 1 p.m. PST. You’ll only be able to use the Premier Balls you earn from defeating Giratina to catch it, so it’s crucial to be prepared.

Source: @PokemonGoApp