Slight update to the file; made it a remover/restorer pair of files to toggle the battles on/off. Now you can patch and un-patch the file.
I tested it with several mods I ran across, and I had:
Successful patches with:
SFII - Gong edition
SFII Maeson
Shining Force 2 Requiem
Shining Tactics
Shining Tactics Steam Edition
Shining Force 2 War of the Gods+
SF2 Challenge Mode
Shining Chaos Prelude
Unsuccessful patches with:
Guy Jepson's Challenge...