Laboratory assistant

A laboratory assistant is a role in which a person helps a scientist (or in the context of the Smurfs universe of fiction, a sorcerer) with whatever experiments they need help in, and also to make sure the laboratory is kept clean when not in use.

Mainstream Smurfs Media
In mainstream Smurfs media, Brainy is normally Papa Smurf's laboratory assistant, as he also serves the role as the village leader's apprentice in magic and sorcery.