Earth Worm Jim 3 (Unl) [p1] [!] (Enhanced colors)
This patch improves many of the color palettes in this game to make it look better, changing the colors of the backgrounds and sprites! Updated to version 1.1 to correct titles
In IPS format, you can use LunarIPS or Floating IPS.
File used:
Earth Worm Jim 2 (Unl) [p1] [!]

The IPS patch must be used on a Nes ROM