2
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PS2 does not have a Harddrive that is a PS3
at least one! if you want to play all the instruments at the same time, use the number of wii remotes to instruments
Charge it, then try, if that doesnt work, restart the PS2. Make sure that any other remotes are not set to primary, if that doesnt work get a new one.
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.