While always intended for the Super Nintendo Entertainment System, they did make a prototype of Kirby Super Star on the NES.
Fun Fact: Final Fantasy IV Was Meant For Another System Than SNES
Final Fantasy IV was originally going to be another title for the NES but Squaresoft eventually made the choice to develop it for the Super Nintendo Entertainment System.
Fun Fact: The Game Breaking Glitch in Battletoads
If playing the American version of Battletoads on NES, due to a glitch in one of the last levels, it is officially unplayable with two players. This was fixed in later versions of the game.
Fun Fact: Japanese Version of Battletoads Drastic Change
When Battletoads was released in Japan, the difficulty was changed to be significantly easier.
Fun Fact: The Importance of Fire Emblem
Fire Emblem on the Nintendo Famicom (NES) was originally a disappointment with sales and critics but later picked up popularity. It was a major cause for the rise of popularity in the Tactical RPG genre.