What If EVERY Gym Leader Terastallized Their Pokémon?

Terastallizing is a pretty good gimmick in the Pokémon games, and each of the gym leaders in the Paldea region used it to the max by adopting a Pokémon NOT of that type! So then, what if this were the case for Every gym leader that we've seen thus far? I'd wager there are some pretty fun results with past Pokémon having unique Tera Types...