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It's been rather quiet after Lan and Mega Man defeated the WWW in Mega Man Battle Network 3. Little do they know that they're about to embark on yet another adventure. An asteroid has been spotted in outer space which is heading towards Earth, and scientists are planning to destroy it with a giant laser. In addition to this, a mysterious Navi called ShadeMan is terrorizing the Internet, sucking the life out of other Navis, much like a vampire. Can Lan and Mega Man stop this new threat?

Mega Man Battle Network 4 is an RPG-like game, and a continuation of the Battle Network series. You play as two characters - a young boy, Lan, in the real world, and a Net Navi called Mega Man on the Internet. Lan can talk to people and interact with the real world, however, when he 'jacks in' to the Internet, Mega Man takes over. In addition to interacting with Navis on the net, Mega Man also encounters random viruses and battles them in a mix of turn-based and real-time battle.

A new feature of Battle Network 4 is the "Soul Unison" feature - as players progress through the game, they can defeat certain Navis and earn the ability to merge with them to become more powerful. The catch with this is that the Soul Unison only lasts for three turns, and that a particular Battle Chip is required to perform it.

The Soul Unisons that you acquire through the game are specific to each version - to get them all, you must link up with a copy of Mega Man Battle Network 4: Blue Moon. You can also trade different Battle Chips (some are exclusive to particular versions) and Net Battle with a friend.


Mega Man Battle Network 4: Red Sun Game Boy Advance The scientists discover a threat to the planet
Mega Man Battle Network 4: Red Sun Game Boy Advance You can also view various bulliten boards for hints
Mega Man Battle Network 4: Red Sun Game Boy Advance Pause Menu
Mega Man Battle Network 4: Red Sun Game Boy Advance It's almost as big as Sim Lim!

Alternate Titles

  • "洛克人:战斗网络红日版" -- Chinese spelling (simplified)
  • "Rockman EXE 4 Tournament Red Sun" -- Japanese title
  • "MMBN4 Red Sun" -- Informal name

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User Reviews

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Critic Reviews

GameZone Game Boy Advance Jul 22, 2004 8.3 out of 10 83
NintendoWorldReport Game Boy Advance Jul 25, 2004 8 out of 10 80
Nintendojo Game Boy Advance 2004 8 out of 10 80
Gaming Age Game Boy Advance Jul 14, 2004 B 75 Game Boy Advance Sep 30, 2004 15 out of 20 75
N-Zone Game Boy Advance Oct 21, 2004 74 out of 100 74
GameSpot Game Boy Advance Jul 13, 2004 6.8 out of 10 68
IGN Game Boy Advance Aug 19, 2004 6.5 out of 10 65
Game Freaks 365 Game Boy Advance 2004 6.4 out of 10 64
GameSpy Game Boy Advance Jul 04, 2004 3 Stars3 Stars3 Stars3 Stars3 Stars 60


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According to publisher Capcom, Mega Man Battle Network 4: Red Sun together with Mega Man Battle Network 4: Blue Moon have sold 1.35 million copies worldwide since its initial release (as of June 30, 2016).
Contributed to by Michael Cassidy (17471) and Ben K (23053)