The original Guitar Hero (2006) and Guitar Hero II (2007) on Wii bundled only the Gibson X-Plorer / Kramer Striker guitar controller.
Guitar Controller Features
5 Fret Buttons (Green, Red, Yellow, Blue, Orange)
Strum Bar (up/down, clicky)
Whammy Bar (analog potentiometer → Star Power activation)
Start / Select / Xbox Guide equivalent (Wii Home button)
D-Pad (navigation)
Wii Remote dock (battery compartment cover) — Wii Remote inserts into guitar for power, Bluetooth, speaker, rumble, accelerometer (tilt for Star Power).
No Other Instruments Included
Drums, Microphone, Keyboard — Sold separately starting with Guitar Hero World Tour (2008) "Band Kit."
Guitar Hero III: Legends of Rock (Wii) — Guitar only (Les Paul model).
Guitar Hero: Aerosmith / Metallica / Smash Hits / 5 / Warriors of Rock — Guitar only (unless Band Kit SKU).
Compatibility
Wii guitars work on Wii / Wii U (backward compat).
Do not work on PS3/PS2/Xbox 360/PC (different dongles/protocols).
PC: Use Raphaël / GHWT USB dongle + GHIE driver wrapper — complex.