So when I was fighting the Genesis Unit during the boss rush (with cheats) twice the game had entered a stalemate.
The first was the result of InstaGib Metal Blade killing Hyper Storm immediately after the phase where he sucks up Buster Rod clones without giving the trio the chance to collide together and die- leaving me stuck. I could not suicide either to restart the fight.
The second one I encountered during a re-attempt has visual proof, where during the phase where Hyper Storm swings Buster Rod with his rod out, the boss is suddenly duplicated and the game crashes not long after.
(http://i.imgur.com/diUHDAE.png)
(http://i.imgur.com/btxYQSs.png)