Finally we can play the UMK3 Hack in Kega Fusion!
Found in here: https://github.com/NatsumiFox/Old-Projects
(Old-Projects-main\Battle Race\Designs\Fusion8 Maker)
The modified Kega was made for a unreleased Sonic hack.
* 8MB version may interfer with Mega CD, since the Mega CD
is accessed by the Mega Drive's main CPU through 4MB to 8MB
Edit:
The exe may show a false positive, but so does the un-patched fusion,
I'm also attaching a 4 KB .ips patch to turn fusion.exe into fusion8.exe.