: Bowser's Castle.
: Gangplank Galleon or The Flying Krook.
: Mt. Silver or any place that is an area and not a stadium. That's why I like the 3DS Pokemon stages alot more than the Wii U stages.
: Dread Island or Dragon's Gate.
: Lunar Fortress from Chapter 13.
: Death Mountain.
: Chemical Plant Zone or Space Colony Ark.
: Osaku Castle(that castle in Chapter 2)
: Oblivia or Sylvalum
: Anywhere that isn't a Lava stage, like Elysium.
: Syrup Castle, S.S.Teacup or basically any area in a Wario Land game
Okay, non-represented areas:
-Any one of the castles from "The Mysterious Murasame Castle."
-A Holosseam from Custom Robo.
-A building overlooking a war zone from Advance Wars, where the field changes depending on which CO/side has captured the building.
-An area from Golden Sun, like the Venus or Mercury Lighthouse.
-Nintendoland.