With Zacian - Hero of Many Battles form appearing in the 5-star raids, the first legendary raid Pokemon from Gen 8 has come to Pokemon GO.
The next Gen 8 legendary Pokemon added to Pokemon GO is Zamazenta - Hero of Many Battles. Zamazenta is a Fighting-type pokemon who has a max CP of 3,829 at Lv. 40, and 4,329 at Lv. 50 — exactly