You knew this was coming. Rules in comments

1. He has to fight each boss individually, not all at once.
2. He has access to basically all forms

X: I wann- *ded*

Chronos: I could- *ded*

Leech: How about I- *ded*

CC:I could- *dead*

Rex: I’m not gunna- *dead*

Cal:AYE IM A CHILD!!

Collector
Mr Void
Tronus

Voiding: Halt. Done.
Elsuper: CTRL+ALT+DELETE
SPECTATOR: ["Looks like you’re going to the shadow realm jimbo"]

A: I’m not there. I’d say him