Reconceptions

So if I save usually it will remove my GBA symbol which it has done all my other pokemon in the box, how do I fix all these pokemon? All I did was change the nature and it removed my GBA Icon and my Memory. How do I fix the memory and the icon? Is this some type of bug? Really need some help here. FYI this is my Moon Save, just need to find out how to get the icon and memory correct so they are legit.