How to Restart in Pokemon Ultra Sun and Ultra Moon
Pokemon games are somewhat notorious for only having one save file. What if you want to play as a different gender, have a different team, choose Popplio instead of Rowlet (and don't lie; you know you want to) all on the same card? Unfortunately, Game Freak didn't see fit to address that problem with its latest games, so the only way to get a do-over in Pokemon Ultra Sun and Ultra Moon is to start over completely. But the games don't do a tremendously good job of telling you how to do that. In fact, they don't tell you period.
How to Delete a Save File
Fortunately, it's super simple to delete a save file in Pokemon Ultra Sun and Ultra Moon so you can start over. On the opening screen, the one where the cinematic is playing, press Up on the D-Pad, B, and X at the same time. You'll then be asked whether you really want to delete all your data and so on. It might take a try or two, unless you have excellent timing when pressing buttons, but you'll get there.
That's it for how to restart your save file, but be sure to check out our other Pokemon Ultra Sun and Ultra Moon guides for other tips and tricks to help you be a Pokemon Master!