Momotarou Densetsu

Sound Test
Use the password "すべてのきよくがききたいな", which translates to "I want to listen to all the songs", to enter the sound test.

Press the A / B buttons on the first controller to select and play a music track. Press the A / B buttons on the second controller to select and play a sound effect.

Picture Test
Use the password "すべてのてきがみたいな", which translates to "I want to see to all the enemies", to enter the picture test.

Press the A / B buttons on the first controller to select pictures.

Both this and the above sound test are in Momotarou Dentetsu, but are disabled and can only be re-enabled through Game Genie codes.