I have the main unit (B).
type game console
Nintendo Micro vs. System Boxing — Two-Player LCD Boxing
The Nintendo Micro vs. System Boxing was part of Nintendo’s Micro vs. System series — two-player tabletop LCD games where each player had their own controller connected to a shared display unit showing both players’ characters. The Boxing game allowed two players to compete simultaneously in real-time, a significant advancement over the single-player Game & Watch format. The Micro vs. System series represented Nintendo’s early experiments with multiplayer handheld gaming, anticipating the link cable functionality that the Game Boy would offer and demonstrating Nintendo’s longstanding belief that shared gaming experiences are more valuable than solitary ones.