Lords of Thunder [Virtual Console] Cheats

At the Configuration screen, put the level on Super, the music to 02, and the sound to 02. Finally, hold Select and press Button I.

Lords of Thunder [Virtual Console] Cheat: Fight the Bosses

At the Configuration screen, put the level on Hard, the music to 01, and the sound to 01. Now hold down Select and press Button I. The exit selection will change to Boss. You may now change your settings to anything you want.