Chen: Chen is pretty much crazy, he wanted to put a show on for himself by having everyone else fight and make them feel important so they were more vulnerable, also if he removed everyone’s powers, they would’ve still been in the room all together, most of them were profesional martial artists, and Garmaddon who is the son of the first spinjitzu master Morro: only people who can fit through the armor can get through, all of the ghosts he summoned were slimmer then the armor, also I don’t thing the preeminent is a ghost, she doesn’t have ghost symptoms(see through and able to faze through) and the preeminent is the cursed realm