It seems, at least, that your extra pair of hands comes with a sensible mind. That's not always the case, with Pokémon that enjoy taking care of eggs and have the means of creating more.

[Speaking from experience? Surely not. Please ignore the fact that all of Cecil's Pokémon choose that moment to laugh. Pure coincidence.]

I've no doubt she'd be able to fulfill all of a trainer's duties, if necessary. Though I imagine the locals would not be delighted by the attempt.