My save file has seemingly gone completely messed up.
The game froze on me, so I just decided to close the window and start PMU back up again. Except now when I click my character, the screen gets to 'Receiving Data... 100%' and then freezes. I have also tried a different character slot, and that worked fine.
Any ideas? I'd just got my Gyarados as well. :(
What's your team Dark Arceus, out of interest?