So I noticed this when the update dropped, and only now managed to get a photo of it. Whenever you win a fight, a bronze brass knuckles appears on each side of the screen, as so:
I believe this is the consequence of how the Sekhmet Return, Hype Mode, and Squigly Charge are all similar to...
kinda hoping for some more move storage in a future update, yeah 300 is a lot but not when you can get up to five per character also i tend to forget to clean up the move section a lot