The main post/announcement states Galar Pokédex No. 001–397, Isle of Armor Pokédex No. 001–210, and Crown Tundra Pokédex No. 001–209 are eligible for battle. However, the "Eligible Pokémon" section highlights Zacian, Zamazenta, Eternatus, Zarude, and Calyrex all legal.
Downloaded the ruleset on...