Mega Man Battle Network 4 Red Sun Glitches and Secrets (GameBoy Advance)

MegaMan Battle Network 4 is the fourth game in the MegaMan Battle Network series. Like Battle Network 3 before it, Battle Network 4 has two different versions, Red Sun and Blue Moon that differ only in minor story and gameplay details. Battle Network 4 is compatible with the e-Reader, and can be linked up with Real Operation and the Battle Chip Gate for NetBattles, they are present in the English versions.

Battle Network 4 greatly differs from Battle Network 3 in many ways, the most notable of which is the concept of DoubleSoul (Soul Unison in the original). DoubleSoul is similar to how the classic-style Mega Man could acquire the weapons of the Robot Masters that he has defeated: by using DoubleSoul, MegaMan.EXE could use the powers of other NetNavis in the same manner as how classic Mega Man could use the powers of the Robot Masters through their weapons. To perform a DoubleSoul, which lasts for a temporary amount of time (three turns), however, a chip must be sacrificed for the battle.

Glitches

Avoid Random Battles (JP Version Only)
To avoid random battles, save your game about every 20 steps. This will reset the game's random seed, which also resets when your next random encounter will be. Now you can go through the entire Net without running into a single fight, or resetting your system because you got into a fight!

Secrets

Easily defeat Dark users in Multiplayer
In multiplayer, Dark users are very tough because they become the Darksoul when you reduce them to 0 hp. However, if you use a chip or PA that freezes time and deals many hits, you can kill them without allowing them to become the Darksoul. A great example is the Pile Driver PA. Hope this helps you take out those cheap Darkies!

Secret Boss
To get past the gate in Ura Internet area 5, you need all 150 regular chips. Once you get past it, you can fight the secret boss, Forte and get his chip, Forte.

Secret Boss 2
After completing the Black Earth dungeon, exit (plug out) and re-enter. You can now encounter Forte SP in Black Earth area 2 and obtain Black Barrier from him.

Secret Boss: Duo SP
One more thing to add:

To fight Duo SP, you need to have all the 7 symbols

1 for Duo

1 for Soul Complete

1 for Standard library complete

1 for Mega Library Complete

1 for Giga Library Complete

1 for P.A. Complete

1 for Forte SP

Go back to where Duo was and fight him there!

Secret Dungeon
There is a large hole surrounded by purple slime on a platform in Ura Internet area 6. In order to approach it, you need the chips ''Bug Charge'', ''Muramasa Blade'', ''Black Wing'', ''Element Dark'' and ''Poison Anubis''. Once you get close enough, it will suck you down to the secret dungeon, Black Earth.

Here's some gameplay footage from this great title: