the wii remote
yes it will for both
Good question.
No, you can use the guitar hero 3 controller, which is wireless, for guitar hero two
No, not for Guitar Hero (Wii) nor Rock Band (Wii).
That completely depends. Is the guitar hero 3 controller for the same platform as the guitar hero 2 controller ? (I.e. xbox 360 or ps2)
Yes. I use my GH3 controller when I play Rock Band.
Yes, It should.
yes
yes
Yes.
Yes
Guitar Hero 3 and newer, yes.