Shaya - you're welcome to make modifications as you wish. These are the legal Starter/CP stages in the Monthlies (anything not in here is illegal):
Legal Stages on Random Select:
Battlefield, Final Destination, Yoshi's Island, Lylat Cruise, Castle Siege, Smashville, Pokemon Stadium, Corneria [D], Bridge of Eldin [D], Delfino Plaza, Luigi's Mansion, Mario's Circuit [D], Great Sea, Norfair, Frigate Orpheon, Battleship Halberd, Pokemon Stadium 2, Distant Planet, Skyworld, Pictochat, Shadow Moses Island [D], Green Hill Zone [D], Yoshi's Island (Melee), Jungle Japes, Rainbow Ride, Onett [D], Brinstar, Green Greens, Big Blue, F-Zero Port Town.
I can send you the SBR stage selections if you like. They are close to Rambo selections, if not more flexible than Rambo was.