Now that the much awaited Pokemon Ultra Sun and Ultra Moon are finally available on the Nintendo 3DS, one of the things everyone should consider in doing after reaching a certain point in the game is to get Rockruff from the Mystery Gift section.
For a limited time, you can get Rockruff by connecting to the Mystery Gift section of the game. Sadly, those who just started cannot start right away as you need to reach a certain point of the game, pretty much after getting your starter Pokemon and reaching the first town gets you to unlock the Mystery Gift section from the main menu.
Once the Mystery Gift is unlocked from the main menu, you can download Rockruff by selecting “Receive Gift”. The elusive Pokemon will be available via Wi-Fi, opposed to entering serial codes like in other events. Connect to the Nintendo Wi-Fi Connection and you will download Rockruff.
Head to the nearest Pokemon Center in-game and find the delivery person to get Rockruff. Upon obtaining the Pokemon, you will see that Rockruff is Level 10, and will be holding a Focus Band.
Now to evolve Rockruff to the dusk form Lycanroc, you must evolve it – normally around level 25. There are conditions that you need to meet in order to really evolve it to the dusk form and this is making sure you evolve it at particular time, which is at dusk (in-game time) between 5:00PM to 5:59PM.
If you somehow evolve it at a wrong time, please note that you can always cancel it by pressing the B button and try evolving it again at the proper time.