I'm not really sure how... but I guess you'll see what I mean, if we run into wild Pokemon.

[He can smell that there are at least Diglett nearby... not close enough to be an immediate danger, but he's going to try and avoid them while leading Luigi out.]

Here, hold onto my tail - [He brushes it against Luigi's fin.] - gently, please. I'll try to lead you to the forest - once we're above ground, you should be able to see the city and go there.

[At least, he hopes. Between the fog and the rain, it's much harder than usual to navigate the outskirts.]