Furthermore, as I find it interesting, this is the list of current classes picked by all invited trainers. Seems like we have a pretty diverse set of skills! 

Edit: Aurina's character is now removed.

Move Tutor - 
Strategist -II
Healer - I
Type master - I
Instructor - I
Tracker - I
Scouts - II
Ranger - II
Survivalist - II
Gadgeteer - 
Pokémon Expert - III
Archaeologist - I
Black Belt - I
Weapons master 
Aura Adept - II
Ninja - I
Paragon -
Debaters - I
Psychics -.
Chef - I
Hatcher - I
Groomer - I