Ninja Boy

Ninja Boy is a single-player action game with an overhead point-of-view. The player can control their character of Ryu in all directions. The game is set across eight worlds with unique themes such as forests, volcanoes, caves and fortresses. After the player has beaten a certain number of enemies, you can move on to the next stage.

Jack can punch, kick various enemies as well as collect power-ups and additional weapons to battle the enemies. Each area is divided into three stages. The number of enemies increase as the player progresses through the game.

Ninja Boy was developed by Culture Brain. The game features similar gameplay to Culture Brain's earlier game Chinese Hero (1986) for the Nintendo Entertainment System (NES).

Ninja Boy was released for the Game Boy in Japan on April 20, 1990. It was released in the United States by Culture Brain USA in November 1990. Along with Ninja Boy 2 (1991) and Super Chinese Land 3 (1995), it was released in a video game compilation Sūpāchainīzurando 1 ･ 2 ･ 3 for the console on September 13, 1996 in Japan.

The two reviewers in Famicom Hisshoubon  compared the game to the Famicom version of Chinese Hero (1986). While one reviewer said the original game was still popular in the area and that it featured cute characters, they found the controls clunky in this version. The other reviewer said that it was even more simple than the NES counterpart and questioned whether it had any advantages on being on the Game Boy.