Note: Some Virtual Console games default to displaying 240 lines of video and some HD TV's are unable to display a signal with only 240 lines.
What to do
- Set the Wii console output to 480 lines of video. Switch between i and p to see if it resolves the issue.
- While on the Wii Channel Menu (main screen of the Wii), connect a Nunchuk to the Wii Remote.
- Select the Virtual Console game from the Wii menu, then select Start to begin the game.
- When the game starts, press the Home button on the Wii Remote. (In many games, the music can be heard when the game starts.)
- Select Operations Guide from the Home menu.
- Press the Z + A + 2 Button simultaneously (the Z Button is on the Nunchuk). A sound will be heard if the button combination has been entered correctly.
- Close the Home menu. The game display should now be correct.