How To Build A Robot

The bad ending is triggered if you choose to fight Shu instead of Zezenen. Shu invokes the curse of Volkruss, Granzon becomes Neo Granzon, Zezenen deals just 10 damage and Shu kills him. And than he summons a few lvl 99 Valsione. I don't get how Shu can still call upon Volkruss since Volkruss should be dead. Sephine should also be dead. To make things worse, my entire team has it's morale reduced to 50. And Shu himself is lvl 99. And his strongest attack can one-hit kill a 20000 Hp unit. Yes ...