There are no games that require "wii swords" what you saw was a third-person holster that does no more than hold the remote.
I think it is wii fit
No!
You can use any Wii games or Wii U games and software. Wii U games don't work on Wii, however, and the Wii games require the TV screen.
No, some games require the Wii Motion Plus Remote to play such as The Legend of Zelda Skyward Sword
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Nintendo Wii has become another main gaming console so yes there are a ton of games for it. The cool thing about the Wii is it is interactive. A lot of the games require you to do some sort of action. Many games will give you a good workout too. If you are a gamer the Wii is a must get!
It exercises the fingers and thumbs but not much else. Many wii games require for you to move about so they could class as exercise.
Most games require a separate Wii remote for each player. For single player games you only need one remote. You can connect up to four Wii Remotes to a single console, or three Wii Remotes and a Wii Fit Balance Board.
You can, but only those that only require the mouse.
Yes, you can connect a Wii Remote to a Wii U. It's required for Wii Mode, and to play any Wii games that require it. Setting up a Wii Remote on the Wii U is done the same way you do it on the Wii - hold down the red buttons on the Wii U and Wii Remote until they connect.
None of the games released before WiiMotionplus will work with it. Some new games being developed are compatible with it, and some require it. Nintendo isn't forcing developers to use it though.
Yes, the Wii U is backwards compatible with Wii games. You need to insert a Wii disk, then go into Wii Mode by selecting the option from the Wii U menu. You'll need a Wii controller to use Wii Mode.