Play MegaMan Battle Network 4 Blue Moon (U)(Rising Sun) Online
You play as Lan, running around the real world while MegaMan fights viruses in a grid-based cyberspace—dodging attacks and slinging Battle Chips feels like a chaotic card game. Blue Moon’s got some neat exclusive chips and a tournament arc where losing actually moves the story forward.

Game Overview
MegaMan Battle Network 4: Blue Moon is one of those GBA games that still holds up years later—it’s like if someone took Pokémon’s collecting and turned it into a real-time brawler with a cyberpunk twist. You’re basically Lan, a kid running around in the real world while your digital buddy MegaMan.EXE fights viruses in this grid-based net world. The combat’s frantic—you’re dodging attacks while slinging Battle Chips like some kind of card game on steroids.
What I love about Blue Moon (over Red Sun, anyway) are the little differences—some exclusive chips, a slightly tweaked story, and this whole tournament arc that actually makes losing a fight feel like part of the plot. The first time I stumbled on a Secret Chip, I totally rebuilt my deck around it. Fair warning: the random encounters can get brutal if you’re not paying attention to weaknesses.
It’s got that classic Battle Network charm, but with a moodier vibe than the earlier games. If you’ve never played one before, expect to spend the first hour fumbling with chip codes before it all clicks.

Download MegaMan Battle Network 4 Blue Moon (U)(Rising Sun) ROM
You can download this ROM to play MegaMan Battle Network 4 Blue Moon (U)(Rising Sun) offline using an Game Boy Advance emulator (Top Emulators).
*This ROM is provided for backup and educational purposes only.