Shadow Dragon (DS), Genealogy, Thracia - Casual Mode

I’ve found ways to play pretty much every old Fire Emblem game with Casual Mode, either via hacks or cheats. (I know you can just use save states, but I’ve done it before, and REALLY don’t want to do it again). The 3 games in the title are the few that I haven’t found any way to do it, and there seemingly isn’t a way at this point. Radiant Dawn also doesn’t have a way yet, but it’s in the works.

Would anyone be able to hack them into these games, or find a cheat to accomplish the same task? I’d really appreciate it, as I’d like to go back and replay them sometime.