The Famicom Ninja is a secret character in the soon to be released game "Ultra Nintendo Warfare Madness Fighting Game". His abilities are:
1 Katana Delete 2 Samurai Tranformation 3 Nintendo Laser Gun
To unlock him, you must defeat Dr. Mutant Mario in a duel using only The Dark Koopa. Also you may unlock him by using Undead Wario's Money Gun move on Bluigi. You will hear his voice saying "Pikachu will die!" if you unlock him.