Two tourists are talking about a lava dome Pokemon being in the plaza. Knowing that Heatran is a lava dome Pokemon it is pretty clear that it is something about Heatran. But what is all this about?
No one is really sure at this point in time. right . Now its just a mystery. is it an event? No one really knows. Eventually, when game freak or someone else finds out, the word will get around
I hope this helped!!!