Upon receiving Zeraora, it will already be at Level 50 and have a special item called the Air Balloon attached to it, which will allow it to nullify Ground-type moves. It will also have a special move called Plasma Fists, which turns all Normal-type attacks into Electric-type attacks for that turn.
GameStop will also be handing out special double-sided posters to those who pre-order Pokemon: Let’s Go, Pikachu! or Pokemon: Let’s Go, Eevee!
Nintendo has posted all of the information for Zeraora and how to obtain it via code, as listed here:
Zeraora
Level 50 Ability: Volt Absorb Held Item: Air Balloon Nature: Random Moves: Plasma Fists Thunder Punch Close Combat Thunder
Use these steps, along with your code, to get Zeraora.
Open your Pokemon Ultra Sun or Pokemon Ultra Moon game. Select Mystery Gift on the main menu. Select Receive Gift. Select Get with Code/Password, then Yes, then Yes again to connect to the internet. Enter your code. Watch as Zeraora arrives in your game. Speak to the delivery person in any Pokémon Center to receive your Zeraora. Be sure to save your game.
Be sure to grab your code before the event ends on November 9 and be one step closer to completing that Pokedex of yours.
