I like to imagine that any Pokémon that uses Helping Hand on Peach is basically chanting “Kick! Their! Ass!” while they do it
she teaches her whole household the move, just in case, so she can gain a little extra stopping power from the hoard of tiny friends she's gathered. They may not be strong enough to stop a goon, but she is!
They all chant "END THIS HUMANS ENTIRE CAREER" and she's game for a fight haha. If only you could translate them all in real time, it'd be hilarious.
Imagine being foolish enough to try to rob the place, several smaller mons caught in a net, and they all start using Helping Hand, leaving their captor very confused as to what they're directing the move at, maybe each other? Queue the looming shadow of the professor, powered up and angry.
Double fun if its a ghost type using the move, she'll knock the soul right out of you with some of that borrowed energy, hit you at the core of your very being. Less fun if an electric type uses it, just makes her very fast, but numbs her out after the hit. static bad.
Each type will have a residual effect on the human body, some good, some bad.