Megaman Battle Network 4: Blue Moon/Red Sun

Strategy Guide


Note: This game is also titled Rockman EXE 4.

Name codes

    Entry name: LAN
    Code: NG75-H5RF-R0MN-440N-2QX[Club]-X341
    Entry name: MAYL
    Code: 8NT8-JZFL-3Q9D-7RPX-T[Diamond]CH-JX51
    Entry name: DEX
    Code: FD[Star]3-3JW1-PS[Star]V-[Diamond]01[Diamond]-[Heart]6R[Figure]-1J32
    Entry name: CHAU
    Code: 93[Figure]5-WXNH-9MWT-[Star]VX8-DY7M-88H0
    Entry name: KAIM
    Code: [Star]SP-3[Heart][Diamond]C-6KGQ-[heart]9FM-XON[Heart]-M[Diamond]P1

Higsby Number Trader codes

GunDelSol EX G74293099
WideShot 3 T68009092
ColorPoint *19095677
FlameLine 3 J57604335
TwinFang 3 G88019791
AirHockey 3 V77038416
Recover300 J66703422
VariableSword C03696458
HP+500 (white)30873642
Buster Pack05178924
HP+500 (pink)97618739
Body Pack43494372

Number Man Lotto codes

Battle Chips

    03696458: VarSwrd C
    19095677: ColorPt *
    32108251: Snake R
    46292983: FlmLine1 G
    57604335: FlmLine3 J
    66703422: Recov300 J
    68009092: WideSht3 T
    74293099: GunSolEX G
    77038416: AirHoc3 V
    88019791: TwnFng3 G

Sub Chips

    00274304: Unlocker
    02368995: Untrap
    14769745: Untrap
    16589650: MiniEnergy
    24247309: SneakRun
    27979609: LockEnemy
    37198940: LockEnemy
    45798331: MiniEnergy
    59891137: Full Energy
    84625799: Full Energy
    89866302: SneakRun
    94872322: Unlocker

Navi Customizer Blocks

    02109544: MegFldr2 (Green)
    05178924: BustPack (Red)
    10170506: Tango (Green)
    25435428: Beat (Blue)
    30873642: HP+500 (white)
    43494372: BodyPack (Blue)
    73298100: Rush (Yellow)
    75420107: Custom2 (Yellow)
    97618739: HP+500 (Pink)

Aqua Soul Unison (Blue Moon only)

Defeat Aqua Man in the first tournament to get his Soul Unison.

Aqua Man V2 (Blue Moon only)

Jack into your PC and go to the first intersection. Go straight. Follow the blue road until the second intersection, then go down. After you follow the road that you went down, there are two roads you can go on. Go to the bottom one. Aqua Man is there.

Aqua Man V3

ACDC1 Aqua Man V3 has 1800 HP. Use electric chips to easily defeat him.

Black Earth

Get the Bug Charge, Muramasa Blade, Black Wing, Element Dark, and Poison Anubis chips. Find the big hole surrounded with purple slime on a platform in Ura Internet area 6. Approach the hole to get sent to the Black Earth dungeon.

Blue Moon

After you defeat Junkman and go through the conversations, just talk to your dad.

Bug Chain

Defeat ShademanSP or LasermanSP without destroying the Green Mystery Data.

Burn Man V3

Go to the park area via the home page. Go down the stairs, and go through the curving path under the stairs. Continue advancing through the park areas until you get to an intersection with a main (orange) road pointing northeast, a purple road pointing northwest, a warp point in the middle, and the road you just came from pointing southeast. Go down the purple road pointing northwest and continue until you reach a dead end. Burn Man V3 is there. Note: All directions are from the warp point.

Darkness Aura

Defeat S-Rank ForteSP in a random encounter in Black Earth 2.

Infinite Zenny

Jack into your computer at home and go towards the first door with the skull on it. When you go there, make sure you are doing a mission like the competition at the dome or something not in ACDC town. When you go there, you find a chip containing money. After getting it, jack out and do the same thing again.

Forte battle chip

Get all 150 chips and go to the gate at Ura Internet area 5. You can now pass through it, and battle Forte. Defeat Forte to get the battle chip.

Hard mode

Successfully complete the game on the normal difficulty setting. Then, select the "Continue" option to access a new hard mode.

Super Hard mode

Successfully complete the game on the hard difficulty setting. Then, select the "Continue" option to access a new super hard mode.


While at the vampire manor in Castillo, check the figure of Django pointing Gunsol at Dracky (the vampire), and you will receive the chip.

Holy Dream

You can buy this battle chip from a shop in Ura-Internet 4 for 100 BugFrags.


Put Short Sword, Wide Sword, Long Sword in a row all of the same letter, it will make Lifesword just as in Megaman Battle Network 3.

Purple Skull Door Key

Make sure you have at least 10,000 Zenny and the C-Slider before attempting to get this. Jack in from an outdoor location (preferably Yumland). Work your way to Undernet 4 and look around until you see Solar Boy standing near a coffin. Solar Boy states that if he had a certain program he will be able to defeat the menace inside when it escapes. To get the program, travel to Undernet 2 via the town area and talk to the Dark Navi who says "The chip is in Undernet 6". Work your way to Undernet 6 and look for a Dark Navi pacing back and forth. Talk to him and he will offer you the program for 10,000 Zenny. Bring the program back to Solar Boy, then an intermission sequence will start. After the sequence, look inside the now empty coffin to find the Purple Skull Door Key.

Red Sun Ray battle chip

Talk to Yuuichiro at ANSA to get this battle chip.

Locked folder code

When your folder is locked someone who told you that he was supposed to fix it, go to ElecTown. Talk to the girl standing near the entrance to ElecTown Square. She will tell you she saw the manager of Jojomon Electrics nearby. Go back and find an old man near one of the stores in ElecTown. He will look at your PET and tell you he cannot fix it without a code. The code is "9651345". Also, when you get an email about PET Maintenance, after defeating Dex and Gustman in the Dencity Tournament, leave the building and talk to the person in front of the building wearing a blue cap. He will install a new folder with weak chips in your PET and lock it so you cannot use your original folder with the good chips. When he leaves, he will drop a piece of paper. You will need someone to fix your PET. Go to Electown area 2 and talk to the woman standing next to the building. Then talk to the old man and he will tell you that you need a seven digit password to unlock the PET. The hints are on the piece of paper. Try one of the following passwords: "1863546", "7374262", and "9681345".

Park Area Gate code

When Lan's alarm from home sounds, he runs home to find that his mom is in his room. She has been sprayed with sleeping gas. She tells Lan that she heard someone typing on his computer. Check the computer. There is a message reading, "You've been warned, Lan. We can easily do much worse. If you don't want those you care for to get hurt more, bring the DarkChip to Park Area 2." Jack in and go to the end of Town Area 3, where there is a purple gate. After the short intermission, a work comes and battles you. Defeat him and he will be knocked out. Search him for the code to open the gate. The code you get is "AJEKDUR 2437561". It is encrypted. Decrypt it and you will get "RAEJDUK".


While in the asteroid and the big magnetic disturbance appears, press A as fast as you can to "swim" down. If done fast enough, you will go down and land once it goes away, and be able to continue.

Secret passage way in Undernet1 to a NetDealer

When you get to Undernet1, go straight and you will walk under a dragon-like mouth and onto the escalator things on the ground. It will bring you to a square with three paths that you can take. Follow the one on the right. This path then breaks into two others. Again, take the one on the right. When you get to the end, there is a hidden pathway you can take by going up. It will lead you to a NetDealer.

Getting through Water God quest

Go to Netopia and go up the only staircase in the area. Then go northeast then northwest and you will eventually find the net connection between Sharo and Netopia. Dodge the conveyer belts in Sharo and you will eventually see the Water God near the top of the Sharo area. Go up the conveyer belt pointing to the Water God. Get the Water God. Go back to the Netfrica area and talk to the official to complete the quest.

Rescuing Number Man

When you are at the part when you have to rescue Number Man, there is a door with three passwords. Clue 1 is "119", clue 2 is "110", and clue 3 is "845".

Defeating Cold Man

Notice that Cold Man constantly puts down ice blocks. If you use Junksoul, you can send all the ice blocks he puts down back at him with Poltrgst for massive damage. Note: Cold Man is a patterned attacker; he will use the ice blocks repeatedly, so you can keep smashing him up.

Defeating Duo

Make sure that your folder is equipped with chips that go above ground, like Wide Shot, Twin Fang, or something similar. Note: Flame Line will not work. Dodge his attacks, then when his middle is red you can do damage. Chips that work well are Gundelsol Ex (Number Man machine code 74293099) and Gun Sol (obtained at the haunted castle at Castillo; almost at the end there is a figure of the person who defeated Dracula, check his leg and get that chip). Use those chips and dodge Duo's attacks to complete that mode of the game. An easy way to defeat Duo is to use PAs. Use a few like Lifesword and just dodge his attacks.

Getting through Water God Comp

    Jack in. Take Blue warp.
    Take Green warp.
    Take Green warp.
    Take Blue warp, get full energy, take Green warp back to last area.
    Take Green warp.
    Take Pink warp.
    Take Pink warp.
    Take Blue warp.
    Take Pink warp.
    Take Green warp.
    Take Blue warp.
    Take Pink warp.
    Take Blue warp.
    Take Green warp
    Talk to program to get 3000 Zenny from him, get FullCust* from Mystery data
    Take Green warp back.
    Take Pink warp, Fight boss.

Saved game icons

Accomplish the following task to unlock a new saved game icon:

    Blue Moon Ray: Defeat Duo in normal mode.
    Forte's: Defeat ForteSP in Black Earth 2
    GigaComplete: Get all 5 Giga Chips
    MegaComplete: Get all 60 Mega Chips
    PA Complete: Use all 30 Program Advances
    SoulComplete: Get all 6 Souls
    StandComplete: Get all 150 Standard Chips.

BattlePoints for Eagle Tournament

You only need 50 to enter the Tournament:


    1 Point: The official that tells you about the preliminaries
    1 Point: Inspect Yai's left giraffe shrub
    1 Point: Inspect painting behind Yai's couch
    2 Points: Inspect Dex's Gamecube in his house
    1 Point: Inspect Mayl's teddy bear
    1 Point: Inspect chip shelf in Higsby's Shop

Elec Town

    1 Point: Inspect metal door with Kanji on it (next to a person in a blue suit)
    1 Point: Inspect the box behind the fence
    1 Point: Inspect the sound system computer on the upper level
    1 Point: Shop next to the fridge (where Lan and his dad went at the beginning to the game)
    1 Point: (Elec Town2) Talk to the person near the exit to the square, partially hidden behind the building

Den Dome

    1 Point: Inspect the bicycles
    1 Point: Left-most DenDome poster
    1 Point: Talk to a person partially hidden by the hot dog shop
    1 Point: Alleyway (contestant entrance) search trash next to vending machine
    5 Points: (Stadium) Jack into the Netbattling machine, play rock, paper, scissors with Mr. Prog
    1 Point: Talk to a kid walking behind the screens inside the main entrance
    1 Point: Inspect the blue door inside the main entrance


    1 Point: Inspect the fountain
    2 Points: Talk to woman partially hidden by the castle
    1 Point: Inspect the pirate ship in the lower square
    2 Points: Inspect steel door in lower square behind red robot
    2 Points: Talk to the boy in the haunted house
    3 Points: Old Man in lower area, hidden by the cart
    10 Points: Battle Evil Navi inside dracky robot near haunted house

ACDC Area 1

    1 Point: Talk to Mr. Prog near the skull gate (purple gate)

ACDC Area 3

    4 Points: Buy from Green Navi for 3,000 Zennys

Town Area 1

    2 Points: Underneath a walkway near the Area 2 entrance

Town Area 2

    5 Points: Give Orange Navi a Cannon C chip

Town Area 3

    3 Points: Talk to Mr. Prog near the merchant

Park Area 2

    3 Points: Talk to the Pink Navi
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