Shiny Sonnfel and Lunastein are now live in Pokémon GO, but these shiny Pokémon are something truly special. They are the first regional shinies in the game.
This is what makes the shinies so rare: Lunastein and Sonnfel are not found all over the world. While Lunastein can be caught here in Europe, Sonnfel can only be found in other regions of the world.
For us German players, this means that Sonnfel cannot currently be caught. Therefore, a shiny of that Pokémon is even rarer.
This is known about Shiny Sonnfel and Lunastein
Here you can find the regional Pokémon: Since the event that has started, the two Pokémon have swapped their locations. This will continue to be the case after the event ends.
Lunastein can now be found in Europe, Asia, and Australia, while Sonnfel appears in North and South America as well as in Africa.
This is what it means for German players: We will only find Lunastein here for now. If you want a shiny Sonnfel, you will need to travel to other regions of the world.
How rare Lunastein is: In the current plant event, Lunastein can be found quite frequently. However, once this event is over, that regional Pokémon is likely to be much harder to find. It will become a very rare shiny.
If you absolutely want a shiny Lunastein, you should take advantage of the current event as much as possible.
Is there still a chance for Sonnfel? The regional Pokémon have already swapped their regions last year. A further change cannot be ruled out.
Additionally, there was already an event where both Pokémon were found in raids, all over the world. So you also have a chance of shiny Sonnfel in such events if a similar occurrence is repeated.
This is why it’s so special: Lunastein and Sonnfel are the first shinies that are regional. All other shinies can be caught worldwide. For Sonnfel, you now have to travel or hope for another change.
Currently, Lunastein and Sonnfel are not in raids. However, these bosses are available:

