Since April 23-24 we've released Shadow and Crystal Pokémon.
Their shiny odds are the same globally. Their encounter rate is 1/35. For the release of this feature we've set the encounter rate to 1/20 for the weekend.
You can find Shadow and Crystal Pokémon in routes and Friend Safari.
They cannot breed Shadow or Crystal offspring's, these comes out as normal Pokémon.
Last but not least, Shadow and Crystal Pokémon can be shiny! ✨
-----------------------------
Shadow Pokémon will do more damage output, but has recoil damage penalty.
And are marked with a 🌑 Symbol and purple marker.
Darkness gauge decreases as you battle in the wild of trainers. Once the gauge is empty, you can purify the Pokémon and is able to gain EXP again after purifying.
However, Shadow Pokémon will not be able to gain EXP as damage boost penalty.
You can only level them to 100 via Training Dojo.

Crystal Pokémon has 25% defense and special defense boost to aid them in a Pokémon battle, used as a tank who can withstand high hits.
And are marked with a :diamond: symbol and blue marker.