Just wanted to give people some update on this:
I talked to DarkAkuma on Reddit and he pointed out to me that his patch will never work on real hardware, just confirming what Ikari pointed out earlier.
EDITED because I understood it wrong. DarkAkuma only tried to look into Nevtskis hack to understand how he did it. I'm sorry if this led to any confusion for anyone reading this.
The incompatibility lies in the format nintendo emulators uses and real hardware differences.
Those plain text SDD1 strings in the ROM are actually SDA pointers which the emulator expect to see but not the real hardware, since SDA pointers refer to external files which again a emulator can use and not a real hardware.
In the end, maybe, in the future he might actually look into this again.
This is just a conversation I had with him, no promises or anything, just a friendly chat so if anyone with the right skills feels like jumping into SFA2 decompressed files, that would be sweet.