Pokémon Ultra Sun and Ultra Moon will feature a new form of Lycanroc, as announced on the official Pokémon website, and Dusk Form Lycanroc looks to be a cross between its Midday and Midnight Form.
Players won't be able to "get Dusk Form Lycanroc on your team by ordinary methods, such as discovering the mysterious Pokémon in the wild," but it's still unknown how to get the pokémon. More details on the Dusk Form will be shared "soon", however, so don't worry about that.
Pokémon Ultra Sun and Ultra Moon feature a new story in the Aloha region and will be released on November 17 on Nintendo 3DS. Is Lycanroc what you're most excited about in regards to this new game?