Majyuuou

Majyuuou
Developer: Eleven Publisher: KSS Platform: SNES Released in JP: August 25, 1995 This game has unused code. This game has a hidden sound test. This game has a hidden level select.

Also known as King of Demons. A Castlevania-style platformer that was only released in Japan.

Music and SE Test

Enter Game Genie code F06D-1DA4 or Pro Action Replay (PAR) code 80890314 to boot into a music and SE test screen when starting a game. Don't play a song above 22 or the game will crash.

(Source: JLukas)

Player Select

This unused menu can be reached with Game Genie code F96D-1DA4 or Pro Action Replay (PAR) code 80890315 and starting a game. Normally, the only way to change player forms is by collecting a crystal at the end of the stage. Also, the final fifth transformation isn't present on this screen.

(Source: JLukas)

Level Select

At the title screen, press Select 15 times. This will result in OPTION being highlighted, and entering the options menu will add a level selector to it. Select your level there and start the game to go to the selected level.

(Source: GameFAQs)