Lots of animals do that if you enter their territory. They're just protecting themselves. If you're stupid enough to get close without watching to see if they're okay with it you deserve to get attacked.

If I see something new then I'll watch and try to learn about it. Unless I think I'm going to see something there's no point in learning about it.

[He'll defeat her clever plan by asking someone to read it to him or just ask his Pokémon directly how they want to be treated, like he does already.]

Those would be useful, but Grandpa didn't have any of those, so we had to keep food from going bad a different way.