Here's something that has always puzzled me for 4 years... the compressed graphics in the Streets of Rage games. I've also recently found out how to find compressed art locations.
Thanks to guides for Pancakes, I at least know where the compressed art offsets for the enemies are located. My doubts about editing compressed art have now been mitigated, once I started using The Sega Data Compressor.
I was expecting the Galsia/Donovan graphics to MissingNo. out, but to my surprise, that didn't happen!
I can link to an IPS with this experiment applied if you'd like.
Apparently, SOR1's font is located at 23A69A. It's also loaded into VRAM at the Sega Logo. The M and T letters from the font are used instead of the TM tiles from the Sega Logo.
I tried to inject BKIII Electra over SOR3 Electra, but failed miserably.