Apparently that’s an additional thank you from the devs for the Pokémon Go Global Catch Challenge.
☆ NintendObs Weekly – Monday, November 27, 2017 – Sunday, December 3, 2017.
Ho-Oh Appearing in Raid Battles around the World!
November 27, 2017
Trainers,
Congratulations! We issued a challenge—and you answered the call. Collectively, you caught over 3 billion Pokémon during the Global Catch Challenge, unlocking some amazing rewards along the way. But that’s not all… As a result of all your hard work, Ho-Oh is now appearing in Raid Battles at Gyms around the world until December 12, 2017. So, gather your friends and find a Legendary Raid near you!
Good luck!
The Pokémon GO team
Source: Niantic.
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…
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