Play Megaman Battle Network 4 Blue Moon Online

Capcom released Mega Man Battle Network 4: Blue Moon for the Game Boy Advance in 2003. It was one of two versions, alongside Red Sun, that came out that year. This was during a period when the handheld was full of these hybrid action-RPGs, and the Battle Network series had already carved out its own niche by blending card collection with real-time combat.

You control a boy named Lan and his NetNavi, MegaMan.EXE, navigating between a near-future world and the cyberspace of the Net. Your main goal is to stop a series of mysterious disasters by competing in a global NetBattling tournament. The gameplay splits into two distinct parts. You explore the real world and various network areas screen by screen, talking to people and solving simple puzzles to advance the story. When you encounter a virus, the field shifts to a tactical, real-time battle on a 3x6 grid. Here, you use a custom folder of Battle Chips, which are essentially attack cards you collect and combine, to unleash everything from cannons to swords against enemies. The game is structured around repeated tournament arcs, which can make the pacing feel cyclical. Managing your chip library and building a powerful, synergistic deck for the increasingly tough boss fights is the core challenge. It feels like solving a fast-paced puzzle each time you enter a battle.