I'd be a bit scared/shocked for about a day or so, then I would get incredibly excited. And I think that because there would be SO many people wanting to start a journey with a Pokemon (think about it, almost everyone played pokemon once. Even if they're not playing the games now, if Pokemon came real, they'd jump straight to it.) and I think it'd slowly become organized and legal into the world. However, I think the Government would be taking so many precautions that they're safe and nothing bad will happen to us, like diseases etc.