How to fix sprite overlay issue?

Question

Unity

The video shows that the sprites of some characters are badly superimposed on the sprites of others and flicker. How to fix it?

https://youtu.be/8FFIz5iqOvg

Answer 1

You can hardcode the sorting of objects in/by group. It is especially convenient if the object is composite, consisting of several sprites.
https://docs.unity3d.com/Manual/class-SortingGroup.html

Answer 2

Google z-fight. There are several solution methods

Answer 3

At the time of the attack, change the layer of the character's sprite to a higher layer, and so on in turn. Crutch but so far that's what came to mind