When a Peacebringer or a Warshade changes to their Nova or Dwarf forms, another power tray will appear. I was trying to remember how to turn it off, and a search on the Internet helped.
Basically, go to Pocket D, and the villian side of it has a truck with a bird on it called Null the Gull. Just be sure to ask him what he can do for you, and the option to disable the power tray should pop up.
While you are there, you may want to change your alignment. He can set you as a vigilante so you can then travel on both the hero side or the villain side. =)