Niantic has announced that Regidrago has been added to Pokémon GO and that it will be available to catch in Elite Raids on Saturday, March 11th, 2023.

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.

Regidrago arrives in Elite Raids!

Trainers,
Consider yourself a Dragon-type Trainer? See how you measure up against Regidrago in Elite Raids, coming soon!

Elite Raid: Regidrago

Regidrago makes its Pokémon GO debut in Elite Raids! Regidrago will hatch at the following times:

Saturday, March 11, 2023, at 11:00 a.m. local time
Saturday, March 11, 2023, at 2:00 p.m. local time
Saturday, March 11, 2023, at 5:00 p.m. local time

Timed Research

Exclusive Timed Research will be available to Trainers who complete an Elite Raid! This Timed Research can only be received once. Complete the research tasks to earn Regirock Candy, Regice Candy, and Registeel Candy!

What are Elite Raids?

Elite Raids are a challenging variety of Raid Battle. They appear from special Raid Eggs that take 24 hours to hatch. Once the Raid Egg hatches, a Raid Boss will appear for 30 minutes—but take note that Elite Raid Bosses can only be battled in-person. Gather your friends and prepare for an epic confrontation!

Defeat Regidrago in an Elite Raid, and you’ll earn an opportunity to catch it.

Remember, Trainers will not be able to participate in Elite Raids using Remote Raid Passes.

Source: https://pokemongolive.com/en/post/elite-raids-regidrago/