Fenn is easy; Froslass, Midday Lycanrock (named Daugi), Alolan Form Ninetails, Mareanie, and Sylveon.
...and Celesteela. She's adorable, and also scary as fuck.

Varin gets; Dunsparce, Pidove (named Aurie), Dragonair, Altaria, Smeargle, and Hydreigon.

Kalista uses; Tsareena, Salazzle, Shiinotic, Duskull, Mismagius, & Cherrim.

Moffit has; Jolik & Galvantula, Spinarak & Ariados, Dewpider & Aquaranid.

I'll explain later when I'm less lazy.