Here are the names of the 32 Gym Leaders and 16 Elite 4s, some are a bit of a stretch, some fit just perfectly, but i like them all.

Noska: Gym Leaders: Mildred, Terry, Roman, Rochelle, Kendra, Ray, Minerva, Hailey.     

            Elite 4: Gaston, Celeste, Horace, Aracely.

Esalia: Gym Leaders: Quentin, Winston, Candela, Katreena, Seamus, Elle & Tricia, Tyler, Clarence.

            Elite 4: Mikhail, Morgan, Tripp, Lennox.
   
Veruba: Gym Leaders: Flynn, Heather, Chelsea, Corrine, Carson, Isaac, Clementine, Ruth.   

              Elite 4: Roland, Rocco, Axel, Eliza.

Sunga: Gym Leaders: Vernon, Samantha, Saul, Blanche, Topher, Noireen, Georgina, Gustaf

             Elite 4: Thelma, Ludivine, Wavelyn, Bolton.


I don't have Champions yet, so i have an idea:

I will make a Champion sprite of whoever guesses all the types for one Region. It can be an OC of yours, or yourself, or whatever, as long as its human.

You can try to guess all 4 of them, but it will only be one Champion Sprite no matter if you get all right.