So, most other games in the series have either natural difficulty (FE12 and FE13) or they have increased difficulty hacks, but AFAIK there is nothing like that for either of these games (at least there is nothing that I can run on my unmodified consoles).
Anyway, I'm starting to think about my next challenge run, and I've considered the possibility of doing something with FE10. It's by far my favorite game in the series. The problem? Even on HM it is too EASY. Any suggestions on how I can make it challenging around the level of FE12 0% growths (not something I've done, just something else I've considered) or FE13 Lunatic+ no grind (my current challenge run)? Unfortunately, I can't hack this game so it is gonna have to be something that is naturally possible.
I've also considered trying something with FE9 instead. I don't have anything specific in mind here either, but I AM able to hack this game at least as much as is possible with a hard copy and an Action Replay. Among the tricks in that arsenal is a code that lets me control any of the characters that show up in the game (no matter if they are neutral, enemy, or just show up on the sidelines for a few turns). I've used this to get people like Sanaki and other super secret characters in the past but this usually corrupted the save file within a few minutes of my getting them, so I am probably restricted to people who are on the battlefield or at least have data in the game. I'm thinking about an all enemy units run but I don't know how that would go since bexp would probably trivialize those even. Havetti solo ftw
Anyway, I am open to suggestions on any way to help make these games challenging, be they legitimate or not (except, again, no FE10 hacking for me). I would like to make them as difficult as possible while still being doable, but not tedious either (I mean, sure FE13 is tedious but that's not really what I mean, a better example of something tedious would be say a Rolf solo because that, while doable, would get boring fast and would not require strategy or have any real purpose).