You can use Pokémon HOME to bring certain Pokémon you’ve befriended in Pokémon Legends: Z-A to Pokémon Champions.

What’s more, there will be a promotion in which you can send Chesnaught, Delphox, Greninja, and Eternal Flower Floette obtained in Pokémon Legends: Z-A to visit Pokémon Champions and receive their corresponding Mega Stones in Pokémon Champions.

Have intense battles in Pokémon Champions alongside Pokémon you’ve adventured with in Lumiose City!

Pokémon Champions Official Website
https://champions.pokemon.com/en-us/

• A Chesnaughtite stone can be claimed by sending a Chesnaught to visit, a Delphoxite stone can be claimed by sending a Delphox to visit, a Greninjite stone can be claimed by sending a Greninja to visit, and a Floettite stone can be claimed by sending an Eternal Flower Floette to visit.
• These Mega Stones cannot be claimed by sending Chesnaught, Delphox, Greninja, or Eternal Flower Floette that have been befriended outside of Pokémon Legends: Z-A to visit.
• Chesnaughtite, Delphoxite, Greninjite, and Floettite can be claimed on both the Nintendo Switch version and mobile device version of Pokémon Champions.
• The Mega Stones available in this campaign may be unlocked in the shop or other areas of the game at a later date.