Nimbus Terrafaux was rumored to be a playable character (a kickboxer) in the first Mortal Kombat game as an unlockable secret character. It was later revealed as a creation of Electronic Gaming Monthly as part of an April Fool's Day joke, though Ed Boon had originally hinted at the character in an interview with the magazine, which then intentionally published false information on this character, complete with doctored screenshots and a fabricated storyline. The character was included in Game Revolution's list of "Top 10 Old School Mortal Kombat Characters" in 2011.
Well, he was the best player (SonicFox) in MKX's main. They even gave Erron a trophy/achievement in MKXL that was named after SonicFox (Fox Finish where you win around with a character dying by Erron's caltrops).