FFV Battle Windows

Very interesting! I think we can consider this a bug in the vanilla version. I believe the screen shots on this page were made with real hardware and they also seem to have this issue. So that rules out the possibility of an emulation issue. It's also possible that this was intentional, but that seems unlikely to me. In a bizarre coincidence, one of the people who worked on the RPGe translation just tweeted a few hours ago about something similar occurring in other games.

I've found the RAM location of the background scrolling HDMA tables which are responsible for switching from the battleground area to the menu area on the screen. I think we would just need to shift the transition up by 1 scanline to fix the issue. I haven't quite figured out how to do that yet but I'm getting close.

*** Update ***

Change one byte at C1/1513 (ROM address 0x11513) from 0xA0 to 0x9F. That should shift the transition from the battlefield area to the menu area up by one scanline.

There is a separate fix for the final battle with Exdeath because it uses a different HDMA table to get the scrolling background effect. Change one byte at C1/158F (ROM address 0x1158F) from 0x04 to 0x03.