The "work" you will find is the labor of love from a dedicated modding community that refused to let the SNES era die. While Nintendo never released a fourth SNES title, the community has ensured that if you want to play a "new" SNES Donkey Kong adventure, you only need to look at the ROM hack repositories—just don't expect it to be an official Nintendo product.
While there might not be an official Donkey Kong Country 4 on the SNES, fans have taken it upon themselves to create unofficial content, including fan art, mods for existing games, and even fictional game ideas based on what they think a fourth game could have looked like. donkey kong country 4 snes rom work
It does not run on an SNES emulator. It requires an NES emulator like FCEUX or Nestopia. The "work" you will find is the labor