I beat diaolga in diamond and now I went to lake versity and mespirt was there he fled pro. rown told me to chase it and to use the markings map wat is the markings map
Its a poketech app you can get it from the jubilife city building
It's a Pokétch App which you get in Jubilife City after getting 3rd badge. Just turn it on and you'll see where are roaming Pokémon.