What are blue Raid Eggs in Pokemon GO?

During the recent Community Day event in Pokemon GO, players noticed an unusual type of egg appearing in Raid Spots.

Tynamo, Mega Manectric, and Therian Forme Thundurus come roaring

How to get free Remote Raid Passes in Pokemon Go (December 2023

Raids - Pokemon GO Guide - IGN

Why is this Raid Egg blue and cloudy? : r/pokemongo

Pokémon Go' Raid: Egg colors, difficulty, how to join, tiers

Red raid eggs in Pokémon Go What are red raid eggs & how they

Pokémon GO on X: No need to ring that dinner bell, Trainers—the

Elite Raids are coming to Pokémon GO

Regieleki Arrives in Elite Raids!

What sort of raid egg is this? : r/pokemongo

New Info (Useless Info) - All Raid Eggs were updated an hour ago

Raid Battle, Pokémon GO Wiki

Pokemon GO Elite Raids: Next date, featured Pokemon, & more