Jikai Shounen Mettomag ("Magnetic Children Mettomag") is a puzzle game developed by Thinking Rabbit for the Famicom Disk System. The game was produced in 1987 by Square under their "DOG" label, which was created to help publish smaller games from minor studios.

The game allowed the player to select their character's gender, which was still a novel feature in video games at the time. There is no difference in how the two genders play; it is entirely a superficial decision. The player must go around each stage and collect every sphere in order to progress. Each sphere can change the polarity of the character from red to blue and vice versa. Each stage is littered with blue and red arrows. Being the same color as these arrows will magnetize the player character, which has different effects depending on the direction the arrow is pointing.