you should be fine as long as it runs at the same speed as the cart its fine

https://docs.google.com/document/d/1GJLeWC3pus4UkIgym7s-lqqmGAll7wiWBtatBnHQqV8/edit?usp=sharing these are notes for the GBA route they are a little old now

hey you can join the Bof discord https://discord.gg/zYVswWK

not too sure on any resources for low dive but you could ask on the Breath of fire discord https://discord.gg/7upBr

im not sure as i use the gamecube GBplayer but i think most other GBA speedruns use VBA 1.7

I don't see why not, you should be fine to run on emulator

well no one is running the japanese version atm and i don't think there would be much difference in overall speed

with save corruption would be a different category, and i just use the same route as his single segment