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.

Raid Battle, Pokémon GO Wiki

Pokémon Go Elite Raids, explained - Polygon

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

Oh wow! 😯 Galarian legendary birds in pokemon go.

Pokémon Go Winter Holiday 2023 event guide - Polygon

Raids - Pokemon GO Guide - IGN

Pokemon Go: How to Play Raid Battles, Best Pokemon for Fighting Bosses

The 4 star raid egg on the Dieno Community day web page shows a

NEW RAID EGGS INCOMING! *ELITE RAIDS* are HERE!

Sandygast Raid Boss - Pokemon Go

What do the blue orbs on Gyms mean in Pokemon GO?

Pokemon Go Raid Boss List: Which Per Egg Star Level, Color?

Pokemon Go Tour Hoenn event guide: Dates, Primal Raids, shinies

Pokemon Go player calls out Niantic as Elite Raid eggs ruin

Elite Raids are coming to Pokémon GO