Earthworm Jim 2 was developed for the Sega Genesis and then ported over to the Super NES. They were released virtually simultaneously and were largely the same game, the only differences being that the Super NES version had alternate background art, and the ability to switch weapons.
Super Metroid: X-Fusion is a Super Metroid hack that recreates Metroid Fusion, with a large number of changes in the story, level design, and enemies while still be faithful enough to be considered a Fusion remake. Lots of bosses returning from the original game, as well as some X-infected versions of Super Metroid's bosses.
This version of the game, released inside the Cowabunga Collection, has the content that was previously unlocked via cheat codes available from the beginning.