Ash:

Pikachu
Greninja/Ash-Greninja
Talonflame
Hawlucha
Noivern

ANNDDD..... TORTERRA!!!!

Reasoning: Well, ASH NEEDS A GRASS TYPE!!! THERE ISN'T ANY TIME FOR DEVELOPMENT FOR IT, SO BRING IN ONE THAT'S ALREADY EVOLVED AND DEVELOPED!! IT CAN ALSO GET SOME WINS, WHICH IT TOTALLY DESERVES!!! I would say Sceptile, but, the whole Shota thing ruined that so NOPE!

Serena: (This'll be surprising XD)

Braixen - Please no evolution PLEASE I HATE DELPHOX
Pancham/Pangoro(haven't fully decided XD)
Sylveon
(IF PANGORO) Absol - YOU SAW THIS COMING FROM A MILE AWAY +Mega evo COZ I CAAAANNNNNNN

Clemont:

Luxray
Bunnelby -It won't evolve
Chespin - It'll never evolve

That's it. Nothing Changes. Just more development for Citron-Senpai plz (AND THE CHESNAUGHT EPISODE WILL NOT SUFFICE!!!)

Bonnie:

Dedenne

That's it derp XP