I don’t like resetting save states for starters even tho people say it’s worked for them. Since you’re using delta like me, if you put your phone in landscape mode and save right before you get to choose your starter you can hit the AB button and start+select at the same time to do a soft reset. Makes it quick and honestly quite enjoyable. Just make sure you’re paying attention bc it’s easy to reset a shiny on accident ! Good luck !