Mighty Morphin Power Rangers: The Movie (Mega Drive)/Hidden content
From Sega Retro
Visual selector, animation test and further options
On the options screen, set "SE Test" to C1, "Music Test" to 82 and "Voice Test" to E8. Highlight Music Test and press 
. This will bring you to a "Visual Selector" screen.
If this process is repeated four more times, an animation test screen will appear when attempting to exit the options screen. It will also trigger a menu for selecting the starting round and whether damage should apply when starting a new game.