lots of cross over games are already made for mugen over the years but doesn't work with dolmexica. I tried to use the assets to dolmexica but it crashes in PS Vita. I don't have a dreamcast but I can try it using flycast. I have tried your dreamcast versions it works on flycast but no one have mod a mugen game for dolmexica or dreamcast with tekken or streetfighter theme or even a cross over.