Okay, so I've picked 10 different fighting games and loaded every possible combination of states between them. The games are:
AV Girl Fighting
Dragon Ball z -Super Butoden 2
Garou Densetsu Special
Kart Fighter
Master Fighter II (SFII nes)
Mortal Kombat II
Mortal Kombat 4
Mortal Kombat II Special
Street Fighter Alpha Zero 97
Street Fighter IV
Most of them just froze, rarely with some glitchy movement or scattered bits of music. But what I noticed is that AV Girl, Garou, Kart, and MK2 Special are the 4 most similar-to-one-another out of the batch - Thay all had at least semi-interesting results with attempted loads - DK JR with Sub Zero's pallete looks pretty funny. Again, here's a video for clarification:
http://www.youtube.com/watch?v=UQ1LU3XAeY0What I find really odd is that MK2 Special works a bit with them, but MKII regular does not. Perhaps MKII Comes before the engine that those 4 use that came from the SFII engine, and then it was developed into this one (the KF/special version) and then with DBZ it was another update, and so on? From a pirates point of view, it would make more sense to instantly release an MK Pirate after your SF pirate, rather than making some whack Mario-SF mix. But who knows, pirates are retarded.