https://boxvsbox.tumblr.com/post/614751806539644928/jekyll-hakase-no-houma-ga-toki-jp-vs-dr-jekyll
Dr. Jekyl and Mr. Hyde was released for the NES by Bandai in 1988 As the name suggests, is based, albeit loosely on the famous novel by Robert Louis Stevenson. It is a farily typical side-scrolling action game common in that era. While the concept is pretty unique, the actual game play does not live up to expectations, at least if you have any at all.
As Dr. Jekyl, you are on your way to the church to get married. However, on the way you come into contact with various townspeople, some of whom for one reason or another annoy you. When your anger meter gets too high, you turn into Mr. Hyde and enter a demon dimension…or something and you start the level from the opposite direction. This is where the “psyco-wave” touted on the box comes into play. Once you kill enough monsters, you turn back into Dr. Jekyl. The goal is to reach the church as Dr. Jekyl before or at the same time as Mr. Hyde. Otherwise, if you meet, a lightning bolt strikes and you die.
There are six levels but oddly some of the levels differ between the Japanese and U.S. versions and some of the levels that are the same are in a different order. I’m not sure why they bothered spending time on doing that sort of thing when the time could have been better spent improving the game. While it actually sounds pretty interesting, game play is frustrating and the graphics are lackluster. It seems that games based on old novels don’t fare much better than games based on movies.
If you do want to try this one, you’ll have to track down an original cartridge or use emulation. There are no re-releases that I know of. However, you can skip this one without missing much. The concept is original but the execution leaves something to be desired.