Hey, I'm always happy to see Furry Fire Emblem content! Especially from the GBA games, which are my favorites! Lyn and the Myrmidon and Swordmaster classes in these games have my favorite Critical Hit animations in the franchise!

I'm happy to find another Furry Fire Emblem fan on this website! And I'm curious about that game you mentioned that you plan on making!

i will be using the lext talionis engine, so the game will be playable in pc withouth doing any patch stuff onto a ROM,
for the plot the basic premise will be that there is a curse that makes people lose the joy of living and makes them think that they must "save" (kill) others , having a dark mage around or being one yourself would (in universe) some some resistance to the curse,
there will be three protagonits one light magic user fox (the one i have as an avatar) a self-taugh human that use staves and also knows to use dark magic, but at first wont be able to use it in battle due to the pressure of the battlefield and having actual no combat experience and a female cat that will start using swords and would promote to red mage

Sounds like a very interesting story! I'm already excited to see how it'll turn out!