Niantic has announced Elite Raids, an in-person only raid battle in Pokémon GO. The first featured Pokémon in Elite Raids is Hoopa Unbound.

PLAYER WARNING:

Niantic has restricted Elite Raids to Raid Passes and Premium Battle Passes only. Players cannot access Elite Raid Battles with Remote Raid Passes. If there are dangerous storms, health restrictions or other reasons that would endanger you during the time period for this event in your area, please do not force yourself to venture out to participate in this event. Damage to devices may also occur in extreme heat and cold weather conditions.

Introducing: Elite Raids

Trainers,
Mysterious Raid Eggs with 24-hour timers have begun appearing around the world! What could this mean?!

Gather your friends to take on Hoopa Unbound!

Hoopa Unbound will appear in a new type of Raid Battle—Elite Raids!

What are Elite Raids?

• Elite Raids are a new, challenging variety of Raid Battles. They appear from special Raid Eggs that take 24 hours to hatch. Once the Raid Egg has hatched, a Raid Boss appears for 30 minutes—but take note that Elite Raid Bosses can only be battled in-person. Gather up your friends and prepare for an epic confrontation!
• Defeat Hoopa Unbound, and you’ll earn an opportunity to catch it.
• Remember, Trainers will not be able to participate in Elite Raids using Remote Raid Passes.

Please note that the first of these raids will begin at 11:00 a.m., 2:00 p.m., or 5:00 p.m. local time on October 16th, 2022, depending on when their Raid Eggs appear.

Elite Raids will appear again!

Look forward to another Elite Raid appearing during the Season of Light!

Source: https://pokemongolive.com/post/elite-raids-new-feature