And David would suggest that he could just concede to anyone who challenged him. And then Charlie would look even more appalled, and David would try to not look too stricken in the face of his appalled-ness.
And then David would tentatively suggest that maybe it would be better for the Pokémon that he didn't own it, because then it might belong to someone who actually knows how to tell it to defend itself. Charlie would then wonder why he was bothering.