Rock Band Cheats - Wii

All songs
Quickly press [Red], [Yellow], [Blue], [Red]x2, [Blue]x2, [Red], [Yellow], [Blue] at the title screen when "Press Start" appears on the guitar or drum controller. Enabling this code will disable game saves.

Unlock Instruments
Complete the indicated task to unlock the corresponding instrument:

Gold drum kit - Complete Solo Tour mode on drums under the Medium or higher difficulty.
Gold Fender American Deluxe Stratocaster HSS guitar - Complete Solo Tour mode on guitar under the Medium or higher difficulty.
Gold Fender Bass - Complete Solo Tour mode on bass under the Medium or higher difficulty.
Gold microphone - Complete Solo Tour mode on vocals under the Medium or higher difficulty.
Silver drum kit - Complete the Bonus Tour on Solo Tour mode on drums.
Silver Fender American Deluxe Stratocaster HSS guitar - Complete the Bonus Tour on Solo Tour mode on guitar.
Silver Fender Bass - Complete the Bonus Tour on Solo Tour mode on bass.
Silver microphone - Complete the Bonus Tour on Solo Tour mode on vocals.
Transparent drum kit - Have a PR firm and a set of body guards at the end of Band World Tour to get an invitation for the Moscow Hall of Fame concert. Complete the eight set song list for that concert on the drums.
Transparent Fender American Deluxe Stratocaster HSS - Have a PR firm and a set of body guards at the end of Band World Tour to get an invitation for the Moscow Hall of Fame concert. Complete the eight set song list for that concert on the guitar.
Transparent Fender Bass - Have a PR firm and a set of body guards at the end of Band World Tour to get an invitation for the Moscow Hall of Fame concert. Complete the eight set song list for that concert on the bass.
Transparent microphone - Have a PR firm and a set of body guards at the end of Band World Tour to get an invitation for the Moscow Hall of Fame concert. Complete the eight set song list for that concert on vocals.

Guitar Solos
Hammer Ons and Pull Offs are a great way to nail solos. If you see a note with a smaller note coming up after it, that indicates you can Hammer On.

For guitar solos (where the background for the notes turn blue and a percentage meter appears) on the Fender Stratocaster guitar only, use the Solo buttons (the small ones near the body of the guitar). You do not have to strum. Just tap the buttons as the note passes the bar. This making solos with lots of notes very easy. Note: You may want to use the included guitar strap to keep one hand on the regular fret buttons and the strumming hand on the solo buttons.