EX Raid Battle, Pokémon GO Wiki

An EX Raid Battle, formerly Exclusive Raid Battle, is the same as a regular Raid Battle, but it is invite-only. These raid battles only occur in EX Raid Gyms. Trainers must obtain an EX Raid Pass, prior to entering battle. EX Raid Battles are similar to existing Raid Battles, with a few notable differences. EX raids periodically appear at EX Raid Gyms around the world; however, unlike existing raids, Trainers are invited to join an EX Raid Battle. To receive an invitation to participate in an EX

Ice Fang, Pokémon GO Wiki

Raid Battle, Pokémon GO Wiki

EX Raid Battle, Pokémon GO Wiki

Hoopa Unbound in Elite Raids - Leek Duck

Legendary raid count Pokemon GO Wiki - GamePress

Elite Raid Battle, Pokémon GO Wiki

Raid Battle, Pokémon GO Wiki

What are EX Raids in Pokemon GO and how can players obtain EX Raid Passes?

EX Raid Pass 1.24.18 Pokemon GO Wiki - GamePress