The legendary Pokémon Lugia has returned as a legendary raid boss to Pokémon Go, with a new and improved Sky Attack move.
Additionally, there are confirmed reports of players encountering it shiny. There are unconfirmed reports stating that a shiny Lugia will be caught in the first ball (as long as it doesn't block/dodge it, of course).
Speculation: Furthermore, it appears that the rates for encountering a shiny Lugia might be higher than standard rates, as there have been numerous sightings in the early hours of it's re-introduction to being a raid boss.
It's re-introduction is likely due to it's starring role in the Movie 21: Everybody's story.
Have you encountered a shiny Lugia? Was it 100% capture rate? Let us know in the comments section!