Pokémon Showdown on Twitter: "PS! Damage Calculator now fully supports Gen 9! A notable change is the addition of the "Tera Type" button. Credits to Kris (https://t.co/IaTbJodq2W), JetOU (https://t.co/cFNCZwH9Y6), Austin (https://t.co/Ra8oiq9GkD), and
Pokémon Showdown! battle simulator
Programming - Showdex - An Auto-Updating Damage Calculator Built into Showdown! | Smogon Forums