Kid Niki - Radical Ninja © 1987 Data East USA, Inc.
North American release. Game developed in Japan. See the original Famicom version for more information: "Kaiketsu Yancha Maru [Model IF-07]".
Description from the back cover:
KID NIKI is truly AWESOME! This rad and bad punk dude is out to rescue his spike-haired girlfriend, Princess Margo, from the clutches of the Stone Wizard. Armed with a razor-sharp sword, this miniature madman slices his rivals down to size!
GAME ID: NES-KD-USA
Released in November 1987 in the USA.
Game's ROM.