sometimes is depends what game you are playing If you're playing by yourself, then you only need one. But if you are playing with someone else, yes you would need two remotes, unless you choose to share the remote. That is possible by clicking on two players and 1 remote.
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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.
Wii remotes need two double A batteries to work.
at least one! if you want to play all the instruments at the same time, use the number of wii remotes to instruments
You need to press the 1 and 2 buttons at the same time with all Wii remotes.
WII remotes are electrical devices which consume power. All devices which use energy require a source for this energy. Wii decided that batteries made the most sense for the energy source.