If you want to make a fan game, make spiritual sequel instead.
Nintendo can’t do much about games that are very similar to Mario, Zelda or Pokemon for as long as they do not copy any assets, (some) names or levels from those games. Based on the videos the main character is unique but most if not all the other art assets are direct copies from the original game.
Some of these could use “Nightdive” treatment like TimeSplitters trilogy.
Simple a PC version of the game with support for latest hardware and operating systems and support for LAN or self hostable multiplayer would give these games new life among people not interested in modern multiplayer games.