The Dino Thunder Power Rangers, the VR Troopers, and the Big Bad Beetleborgs fight for American tokusatsu(?) supremacy.
Core teams only (no auxiliary/extra Rangers, BBs, or Troopers)
All teams have access to all power ups/upgrades.
Giant mechs are prohibited (simply because I don't remember if the VR Troopers and Beetleborgs had Zords, or the respective series equivalent to Zords), unless the VR Troopers and Beetleborgs actually had Zords.