I was playing zombie pods on multiplayer and, in the boss room, one guy of the three of us did not get teleported in. So, the two(?) Regurgitator bosses went to the door and started a continuous stream of puke worms. There were so many worms my game broke.
The End.
I agree with some here who say this game requires insane grinding. However, you can put together a team capable of stunlocking most opponents. I did. Sometimes if my opponents don't die on my first turn, they are frozen. fun game though having bad luck can screw you thoroughly.