Pokémon nurses are kind nurses that take care of pokémon. In the anime, every Pokémon center is run by Nurse Joy. As a rule, Nurse Joys are kind, earnest, honest Pokémon nurses who take care of sick and injured Pokémon, but will confront a Pokémon Trainer if they are not properly caring for their Pokémon. Joy is a family name and all the nurses are identical, having similar looking relatives.

In addition, Nurse Joys give out starter Pokémon to trainers in towns or cities without Pokémon Professors. Adhering to their role as government workers, they are also inspectors for the Pokémon Inspection Agency grading Pokémon gyms. They also judge pokémon contests and the grand festivals.

-Definition from Bulbapedia

Well, you saw how belle took care of Beast's wound from the wolves. so i chose her