"U" is ambiguous. Here are the likely meanings:
If you meant Wii U: Insert Wii disc → Launch "Wii Menu" → Play. Wii Remotes + Nunchuk/Classic Controller required. Wii U GamePad acts as screen only (no sensor bar built-in—need separate sensor bar or Wii Remotes with MotionPlus).
Reply with what "U" refers to for a precise answer.