Do you have to trade legendaries to complete the pokedex?
Assuming no one will trade you a legendary without one in return, is a legendary swap the only way to complete the 'dex? Charlietbh - 4 weeks ago
Yes. As you need both Zacian and Zamazenta (and you obviously can get only one per save), you need trading to complete the dex. Same with other exclusives, but they can be obtained via raids, too: you just need to find a raid hosted by the opposite version.
You can trade back the legendary as soon as you receive it: it will be registered to your Pokédex. Axews (Expert) - 4 weeks ago