Only special Rockruff can evolve into a Dusk Form Lycanroc, and neither this Rockruff nor Dusk Form Lycanroc can be caught in normal gameplay. But you can get a special gift of this Rockruff as an early purchase bonus with Pokémon Ultra Sun and Pokémon Ultra Moon. Players in Australia and Europe can now receive this special Rockruff that can evolve into Dusk Form Lycanroc via Nintendo Network until Wednesday, January 10, 2018.
The Rockruff on offer is a level-10 Pokémon that comes with a Focus Band item. In Pokémon Ultra Sun, this Rockruff fittingly knows the move Fire Fang. In Pokémon Ultra Moon, it knows Thunder Fang and Happy Hour. In both games, this Rockruff can evolve into Dusk Form Lycanroc between 5 p.m. and 5:59 p.m. Evolve this special Rockruff and have an adventure in Pokémon Ultra Sun and Pokémon Ultra Moon together with your Dusk Form Lycanroc!