Unlike the old Pokemon games, you cannot just start a new game and save over it. For this reason, the games make it quite difficult to delete your save data. In Pokemon Ultra Sun and Ultra Moon, your save data is precious, especially if youve spent hundreds of hours trying to fill up your Pokedex or creating a competitive team. How To Start A New Game In Pokemon Ultra Sun & Ultra Moon Professor Oak will ask you your name, you can create your avatar again and start the adventure in your house in Pallet Town. Turn on Pokemon Lets Go Pikachu or Eevee on your Nintendo Switch and youll start the adventure all over again.Click on the Pokemon Lets Go Pikachu or Eevee icon and choose the « Delete save data for Users » option.Choose « Manage save data / screenshots and videos » and select « Delete save data » on the next screen.Scroll down to the « Data management » option.When you are in the Nintendo Switch menu, choose the « System Settings » icon at the bottom of the screen.To remove your actual game of Pokemon Lets Go Pikachu and Eevee, its in the Nintendo Switch system menu and not in the game menus ! How To Delete Your Game Save Pokemon X & Y Nintendo 3DS YouTube