Howdy! [oh that is a Large Man] Welcome to Johto! I'm very sorry to tell you this, but this is not a dream. This land has a certain magic that sometimes pulls in people from other worlds.

[He's frowning as he explains; it's news that people often take poorly. But at least this human likes their Pokemon?]

And that is a Bellsprout! It will be your new partner while you are here!