So I was recently shiny hunting and on a small 3DS screen and it would be pretty hard to tell if a Pokemon was shiny if I wasn't paying attention to the shiny sparkle. This got me thinking, right now in Pokemon Legends Arceus, if you encounter a pokemon, during battle there will be the shiny mark next to it's name, and it's extremely useful for those Pokemon that have a very subtle change.
So my question is, is there a mod/hack for any of the 3DS era of Pokemon games that adds the shiny mark to the Pokemon's HP bar like Pokemon Legends Arceus?
Or is there a way that I can go in and add it? I'm a software engineer so I could add something in, but I've never had experience messing with the code in a pokemon game.