Changing the time on a wii console

There are currently no games supporting multiple Balance boards, and I don't expect there to be any, if only for the price of the devices, and the amount of space needed for such a setup.

All current games supporting multiplayer with a single balanceboard do so in a hot-seat style. (or should I say hot-board)

Technically, for as far as I can see, the Wii itself is perfectly capable of supporting multiple balance boards, but I don't know if this functionality is even availble for developpers

After the credits roll and Mario/Luigi, Peach, and Yoshi make it all the way back to "Yoshi's House" and the eggs hatch, it shifts to the tableau of Mario, Luigi, and Peach (that you mention).

For the SNES and virtual console version of this game, that's all there is to it -- there's no new game plus option, and no way to save the game after beating bowser. The Gameboy advance version of Super Mario World (It was rereleased as Super Mario Advance 2: Super Mario World ) however, featured additional content after the game ended while collecting all the dragon coins. But, as this was specific to the gameboy advance port of the game, yes, that final tableau is really the end.

Edit: Actually, I'm not positive about the GBA port. It depends on whether or not Bowser's castle level has dragon coins, I suppose.