Up to 4.
Two.
Most Wii games can have up to 4 players for local play.
Yes
Many if not most Wii games allow for up to four players to play at the same time. Examples include Mario Kart, Super Smash Brothers Brawl, Mario Party 8 and Wii Sports Resort.
It depends on how many players you have, but at the most 4 Wii remotes.
For local multiplayer, the Wii can only ever have four Wii remotes connected to it at any time. Therefore it is not possible to have a game that supports more than four players in local multiplayer. On the other hand, there are games that support as many as 12 players in online multiplayer.
Two Players
You can only play multiplayer on the Wii Fit Plus, not on the original Wii Fit.
Twelve.
2 or more
Maximum of two players
with the playstation system- 2 with the wii system- 4