You can get Pokemon GO Crowned Sword Zacian/Shield Zamazenta and Crowned Sword Energy by following this detailed guide.

If you want the special forms of Zacian and Zamazenta, you’ll need to collect Crowned Sword and Shield Energy. Here’s how to get it, including some free codes.

To get Crowned Shield Zamazenta, you'll need to have a Zamazenta that knows the move Iron Head, 1,000 Crowned Shield Energy, and 30 Zamazenta Candy.

Trying to catch the legendary Zamazenta in Pokemon GO? Here's how you can get the rare Pokemon.