Nintendo's first and only samurai character. He made his debut in "The Mysterious Murasame Castle" for the Famicom, the same year that Link, Samus, and Pit's games debuted in Japan. In that game, an alien creature posses a statue in Murasame Castle, and spreads it's evil influence among the four neighboring castles in the Edo era. The shogun sends out the samurai apprentice, Takamaru, to investigate the problem, all while dodging and defending himself from an endless swarm of ninjas and hannyas. However, Takamaru is armed with his katana and shurikens as he makes his way through the castle grounds.
Takamaru is an extremely obscure character in Nintendo's history, as he only appeared in his debut game, and made cameos in several others. The only time he is referenced is the Nintendo Land attraction, Takamaru's Ninja Castle, Samurai Warriors 3, Captain Rainbow, and Smash; being a sticker in Brawl, and eventually an assist trophy and costume in Smash 4. He was suggested in Melee and Smash 4, but sadly got the axe because of his obscurity.
Hopefully, The Mysterious Murasame Castle receives the "Kid Icarus: Uprising" treatment in the future, and that Takamaru will draw his sword again as a full playable.