The Navi Customizer (ナビカスタマイザー Nabikasutamaizā), NaviCust for short, is a NetNavi customization program released by SciLab in Mega Man Battle Network 3. Yuichiro Hikari is the chief developer of the program. It was made for the PET models Plug-in PET, Advanced PET, Progress PET, and Link PET_EX.
In Mega Man Battle Network 3, if Lan uses a Navi Customizer program that the current Style did not support and rebooted MegaMan.EXE, he'd get an error, MegaMan would not be able to boot up, unless remedied with an Extra Code. However, in the fourth, fifth, and sixth games, the errors disappeared due to MegaMan overloading to destroy Alpha. In doing so, he nearly killed himself, but when Lan gives Yuichiro Tadashi Hikari's letter, MegaMan is recovered from Alpha's body. However, his letter removed the Style Change. So, Double Soul was made as a suitable replacement.
In Mega Man Battle Network 3 and 4, Lan's Dad will explain how the Navi Customizer works. But in the later games like 5 to 6, a scientist will replace his dad for the Navi Customizer tutorial.
The Navi Customizer consists of a set area, and a Command Line running through the center of the area. Through all of its incarnations, it has four basic rules:
- Solid programs must be placed with at least one block on the Command Line. If this rule is broken, not only will bugs occur, but the program will not take effect. Even with Bugstop enabled, this rule must still be applied for the program to work.
- Textured programs must be placed off the Command Line.
- No two programs of the same color can touch each other.
- All equipped programs must match MegaMan's compatible colours (white, yellow, pink, and an additional one depending on his Style)
- From BN4 onwards, this rule changes to: No more than four different colors may be placed in the area.
Breaking any of these rules will result in bugs occurring in MegaMan, and each bug has different effects depending on the part(s) that violate the rules. All bugs can be omitted by the NaviCust program BugStop, which allows most rules to be broken; solid programs still need to have at least one block on the command line to take effect.
Each NaviCust piece is a combination of blocks, and is either completely solid or completely textured. If the player possesses the Spin item of a piece's color, they will be able to rotate all pieces of the same color with the L or R buttons - a valuable asset when it comes to maximizing the use of the NaviCust's limited space.
The NaviCust is always at a tiny 4x4 area the moment the player receives it. To expand it, the player must find "ExpMemory" items, which will boost the space to a 5x4, and eventually a 5x5 area, allowing for maximal programs to be installed.
The NaviCust is always introduced with the Undershirt, Attack+1, and Speed+1 programs.
In Mega Man Battle Network 6, parts can now be placed off the Navi Customizer's main area, on the condition that at least one block of the part is left in the main area. Also, regardless of whether or not a block is on the main memory map, no blocks can be placed on the outside corners of the map (i.e. off-map areas only extend off the main map and do not allow corners outside of the map). This has resulted in the total space available being almost doubled. The Command Line is also capable of reading "hidden" parts, as long as they're aligned with the main Command Line. However, placing parts off the main area will, once again, result in bugs.
Extra Codes & Error Codes
In Mega Man Battle Network 3, different Styles are compatible with different NaviCust program colors. In addition to MegaMan's innate compatibility with yellow, pink, and white programs, a Style is compatible with an additional program color:
- Guts/Shadow: Red
- Shield/Custom: Blue
- Team/Ground: Green
- Bug: Grey
If any of the programs to be installed are of an incompatible color, the NaviCust will bring up an error, and MegaMan will not be able to boot up, unless the player can remedy this using an Error Code with the ModTools accessory. The Giga Folder and Hub Batch programs are purple and orange respectively, forbidding the player to use them in any Style without their proper corresponding Error Code.
To use the Error Code, press Select in the NaviCust when the system reports an error or says "OK!". The screen will bring up a series of alphabets and numbers. By inputting the correct sequence, Lan can remedy the error and allow MegaMan to boot up. If no incompatibility error is present, the Extra Code can be inputted to give MegaMan extra abilities. Be warned that some abilities have side effects.
List of Extra Codes
|JIEU1AWT||HP +100||No glitch|
|AWE3ETSW||HP +400||Custom screen capacity -1|
|ZMJ1IGIE||HP +600||Custom screen capacity -2|
|DMGEIO3W||HP +800||Stepping off a panel converts it into a Poison Panel|
|KTEIUE2D||Super Armor||No glitch|
|SKDSHUEO||Break Charge||Custom screen capacity -1|
|SI1IEMGO||Break Buster||Custom screen capacity -2|
|JDKGJ1U2||Mega Folder 1||No glitch|
|3DIVNEIQ||Mega Folder 2||Custom screen capacity -1|
|URY33RRO||Mega Folder 3||Stepping off a panel converts it into a Poison Panel|
|FFIM1OWE||Mega Folder 4|
|SKFBM3UW||Mega Folder 5|
|SK13EO1M||Reflect||Custom screen capacity -1|
|GKHU1KHI||Shadow Shoes||No glitch|
|L3KJGUEO||Anti-Damage||Custom screen capacity -1|
|ZN3UDOIQ||Air Shoes||Custom screen capacity -1|
|XBCJF2RI||Fast Gauge||Custom screen capacity -2|
|2BKD1UEW||Slow Gauge||No glitch|
List of Error Codes
Note that after successfully inputting an Error Code, the game will remember the same code every subsequent time that error is encountered, and will automatically input the code when the Extra Code interface is brought up during the error report.
|Error Code||Program||Obtained From||Error Number|
|GYU2OPZQ||Super Armor||Guts Style||A1|
|JHGIUTOP||Set Green||Ground Style||B1|
|X2CD3KDA||Custom 1||Custom Style||C1|
|WS1FS1AQ||Dark License||Bug Style||D2C|
|P2I3MSJL||Mega Folder 1||Team Style||E1|
|UTIR1SO2||Mega Folder 2||E2|
|TIS1LAEJ||Giga Folder 1||G2C|
|A3DJMNB1||Shadow Shoes||Shadow Style||H1|
Programs can be reduced by a few squares by inputting a Compression Code. Doing so will shrink it, allowing for more programs to be inserted. Each program has its own unique compression code in each game. In Mega Man Battle Network 3, to input the compression code, highlight the program that's going to be compressed, hold Select, and input the commands (by pressing a sequence of buttons on the controller). In Mega Man Battle Network 5 and 6, highlight the program, hold Right, and input the commands. Mega Man Battle Network 4 does not utilize Compression Codes as the Programs come already pre-compressed. Note that if inputting the incorrect button during in a sequence, it will play an "incorrect" sound for that specific button, allowing trial and error knowing which button to press is the correct one (this doesn't happen on MMBN6, as there no indication).
|Program||BN3 Code||BN5 Code||BN6 Code|
|Undershirt||← ↑ B L ← ↑||ARBBRLRALA||RRALLRAABB|
|Sneak Run||R L B ↓ ↓ ↓||RLLALLBABB||BBBABBAARB|
|Oil Body||↑ → A A R ↑||LBRARLABLB||LRABARBBLR|
|Fish||L R ↓ ↑ ← →||BABALRARAA||ARAABARRBA|
|Battery||→ R → R L ←||AABRABRLLR||BRBBBBBARR|
|Jungle||A R ← B B A||LRLABLBBLA||ALARBRARLB|
|Collect||B ↓ → R → →||BRALARBAAB||ALABBAAABA|
|Super Armor||↑ → ↑ R ↑ ↓||RABRALLRBA||ABLLAALRBA|
|Break Charge||B A ← L ↑ B||N/A||N/A|
|Break Buster||R A B ↓ L L||N/A||N/A|
|Air Shoes||↑ B B ↓ A R||BLBABLBBAA||ARBABRRBAL|
|Float Shoes||← ↓ ← ↓ ← L||ALLBRLAAAL||RALABLBBRB|
|Shadow Shoes||↑ ← → L ↑ R||N/A||N/A|
|Block||↓ B ↑ ↓ A ←||N/A||N/A|
|Shield||← → ↓ R ↓ R||ABARALRBBA||RBBBAAABRL|
|Reflect||B ↑ A ← ← B||LLRBLLAALB||LAABRRLRLR|
|Anti-Damage||L ← R A → ↓||RBBARBRARB||BLALBRALBA|
|Custom 1||→ → → ↑ ← B||AARLBABALB||LBBRBAALRR|
|Custom 2||A ↓ ↑ ↓ R ↓||BARLLRALBR||RALLAABRBA|
|Mega Folder 1||→ R ↓ R L ←||BBABBRRLAR||ARLALALLAB|
|Mega Folder 2||A R ↓ ↓ → ←||LABBLBAALL||LALRBLRLRA|
|Set Sand||← A A B ↑ ←||N/A||N/A|
|Set Metal||B R → → L L|
|Set Ice||A ↑ A ↑ ← R|
|Set Green||↓ R R ↓ B ←|
|Set Magma||B → → B R A|
|Set Holy||A B R R ← R|
|Fast Gauge||B ↓ A R ← R||N/A||N/A|
|Bug Stop||B ↓ ↑ B ↓ B||BABLABRLRB||AAABRLBAAL|
|Humor||↑ R A ← → →||ABLARABLRL||LLABLBABLL|
|Black Mind||→ ← → ↓ R ↓||N/A||N/A|
|Beat||A ↓ A A R A||ABBRAABRBR||LRBBALRABA|
|Tango||A ↓ → L L R||LBLABLABAL||BRBRRABBRA|
|Rush||L A ↓ B B B||RBLRBRLLRL||RLBAABALLR|
|Buster MAX||↓ A R R L ← ←||N/A||N/A|
|Giga Folder 1||L ↓ A ↓ R B ↑||RRLBLLARBL||BLBRLLLABA|
|Dark License||R L R ↓ ← B R||N/A||N/A|
|Hub Batch||B ← A ↓ ↓ ↑ L||N/A||N/A|
Navi Customizer Programs are the program blocks for the Navi Customizer that allow a NetOp to upgrade and personalize their NetNavi with new abilities.
Common Solid Programs
These programs must be placed on the Command Line to have their effects applied. Failure to do so would not only prevent them from working, but will also create bugs in programming. All the following programs can be found in all games from Mega Man Battle Network 3 to 6.
|Under Shirt||Prevents Megaman from getting deleted if he takes an amount of damage greater than or equal to his current HP by restoring his HP to 1. This only takes effect if current HP is above 1.|
|Super Armor||MegaMan cannot flinch. This prevents him from being interrupted while attacking, and prevents loss of Busting rank due to getting hit.||Hinders the player's ability to move MegaMan.|
|Air Shoes||MegaMan can stand on holes.||Panels which MegaMan steps off become cracked, destroyed, or Poison panels.|
|Float Shoes||MegaMan does not suffer from ill effects of panels. This means he does not slide on Ice panels, does not get burnt by Lava panels, etc. He still takes double damage from Fire and Elec attacks on Grass and Ice panels respectively though, and in Battle Network 3 he still takes damage from standing on Poison panels, and creates holes when he moves over cracked panels.|
|Anti-damage||By pushing B + ←, MegaMan enters a temporary state. Any damage done in this state is negated, and a throwing star will be thrown at the nearest enemy, damaging it.|
|Custom 1||Increases initial Custom capacity by 1.||HP depletion while accessing the Custom Window.|
|Custom 2||Increases initial Custom capacity by 2.|
|Mega Folder 1||Increases Mega Chip capacity in the folder by 1.|
|Mega Folder 2||Increases Mega Chip capacity in the folder by 2.|
|Shield||By pushing B + ←, MegaMan pulls up a shield that can block non-breaking attacks.||Hinders the player's ability to move MegaMan.|
|Reflect||By pushing B + ←, MegaMan pulls up a shield that can block non-breaking attacks and damage all enemies in the same row as him.|
|Bug Stop||Prevents glitches from occurring, allowing the player to break the rules of the Navi Customizer with no drawback.||Cannot be glitched.|
|Sneak Run||This gives a permanent effect of the Subchip of the same name, allowing MegaMan to go about with reduced chance of randomly encountering weak viruses.||Raises random encounter rate.|
|Oil Body||Raises encounter rate of Fire-attributed enemies.||Reduces encounter rate of Fire-attributed enemies.|
|Water Body||Raises encounter rate of Water-attributed enemies.||Reduces encounter rate of Water-attributed enemies.|
|Battery||Raises encounter rate of Elec-attributed enemies.||Reduces encounter rate of Elec-attributed enemies.|
|Jungle||Raises encounter rate of Wood-attributed enemies.||Reduces encounter rate of Wood-attributed enemies.|
|Collect||Forces the rewards from battle to become a battle chip that can be obtained from the fought enemies. No data is acquired if they do not drop battle chips.||Forces rewards to become Zenny instead.|
|Humor||Pressing L in the real world will have MegaMan tell a (bad) joke.||Causes MegaMan's Emotion Window to flicker between available states.|
|Rush||During multiplayer matches, if the opponent uses Invis or Mole chips, the chip is negated and they are paralyzed.|
|Beat||During multiplayer matches, once per turn, if the opponent uses a Mega or Giga class chip, the chip is stolen and you use it instead.|
|Tango||During multiplayer matches, when MegaMan's HP falls to 25% of max HP or lower, it heals him and may provide a barrier.|
|Giga Folder 1||Allows the player to add 1 more Giga Chip into their folder.||Panels which MegaMan steps off are turned into Poison panels. Cannot be fixed without BugStop.|
Common Textured Programs
These programs have four shaded squares on each tile. They must be placed off the Command Line. Failure to do so will cause bugs. The following programs can be found in Battle Network 3 to 6.
|Attack +1||Buster damage +1||Buster may fail to fire. (Guard and Misfire)|
|Speed +1||Buster fire rate +1|
|Charge +1||Buster charge speed +1|
|HP +50||Max HP +50||HP bug during battle. Severity increases if similar bugs exist.|
|HP +100||Max HP +100|
|HP +200||Max HP +200|
|HP +300||Max HP +300|
|HP +400||Max HP +400|
|HP +500||Max HP +500|
The following programs appear only in certain games.
|Break Charge||3||Solid||Charged Buster shots can break guards.|
|Break Buster||3||Solid||Normal and charged Buster shots can break guards.|
|Shadow Shoes||3||Solid||MegaMan can move over cracked panels without breaking them. This is later integrated into the Float Shoes program.|
|Set Metal||3||Solid||The battle starts with all panels as Metal panels.|
|Set Sand||3||Solid||The battle starts with all panels as Sand panels.|
|Set Green||3||Solid||The battle starts with all panels as Grass panels.|
|Set Ice||3||Solid||The battle starts with all panels as Ice panels.|
|Set Magma||3||Solid||The battle starts with all panels as Lava panels.|
|Set Holy||3||Solid||The battle starts with all panels on MegaMan's side as Holy panels.|
|Block||3||Solid||Pushing B + ← will have MegaMan temporarily enter a state where any damage suffered is halved.|
|Fast Gauge||3||Solid||The Custom Gauge fills up at double speed.|
|Press||3||Solid||This compresses MegaMan, allowing him to walk on thin beams located all across the net.|
|Energy Change||3||Solid||This allows MegaMan to use Aqua chips to put out FlameMan.EXE's fires or use Fire chips to burn down PlantMan.EXE's vines.|
|Black Mind||3||Solid||This gives MegaMan an evil aura, allowing him to communicate with certain Heel Navis.|
|Alpha||3||Solid||This allows the player to spot tiles on the floor where Alpha is hiding, and avoid them.|
|Buster MAX||3||Solid||Increases all Buster stats to 5. Charge shot level is unchanged. Causes a bug where all loaded chips in battle will be automatically used at the first possible opportunity.|
MegaMan can use certain Giga chips without needing the "Hole" chip.
|Solid||Gives a number of effects, including Break Buster, Super Armor, Air Shoes, Float Shoes, Custom 1, Mega Folder 1, Shield, and Under Shirt. Causes a bug that halves MegaMan's max HP.|
|First Barrier||4, 5, 6||Solid||MegaMan starts the battle with a 10 HP Barrier.|
|Buster Pack||4, 5, 6||Solid||+3 to all Buster stats.|
|Body Pack||4, 5, 6||Solid||Gives Air Shoes, Float Shoes, Super Armor and Under Shirt.|
|Soul Cleanser||4, 5||Solid||Increases the rate at which MegaMan recovers from "Dark MegaMan" state by battling without using Dark Chips.|
|Millions||5, 6||Solid||All Green Mystery data becomes Zenny.|
|Auto Recover||5, 6||Solid||MegaMan regenerates some HP at the end of each battle.|
|Auto Run||5||Solid||MegaMan can run without needing to push the B button. This actually reduces the encounter rate slightly.|
|Chivalry||5||Solid||Pushing L in the real world will allow MegaMan to give some masculine comments.|
|Mega Virus||5||Solid||Allows MegaMan to encounter Tier 2 Viruses without needing to open the portal to Nebula Area 1.|
|Giga Virus||5||Solid||Allows MegaMan to encounter Tier 3 Viruses without needing to open the portal to Nebula Area 4.|
|Support||5 (DS)||Solid||Allows MegaMan to use his Support ability while not in battle via the Party Battle System.|
|Change +1||5 (DS)||Solid||Allows the player to perform one additional Navi Change with the Party Battle System.|
|Change +2||5 (DS)||Solid||Allows the player to perform two additional Navi Changes with the Party Battle System.|
|Chip Shuffle||6||Solid||Grants access to the "Search Shuffle" ability once per turn in the Custom Screen.|
|Number Open||6||Solid||MegaMan starts with 10 chips in the Custom Screen.|
|Poem||6||Solid||Pushing L in the real world will allow MegaMan to recite a poem.|
|Slip Runner||6||Solid||MegaMan can run without needing to push the B button. Pushing B and a direction will cause him to continuously slide along the map until he hits a wall. No viruses will be encountered until he stops sliding, and the encounter rate is reduced while running.|
|Folder Pack 1||6||Solid||Grants Custom 1 and Mega Folder 1.|
|Folder Pack 2||6||Solid||Grants Custom 2 and Mega Folder 2.|
|Weapon LV +1||3||Textured||Upgrades MegaMan's Style Change charge shot level by 1. Does not work with Normal Style. Caps at 3.|
|Regular +5||3||Textured||Increases memory for Regular Chip by 5 MB.|
|Attack MAX||4, 5, 6||Textured||Increases Buster attack to 5.|
|Speed MAX||4, 5, 6||Textured||Increases Buster firing speed to 5.|
|Charge MAX||4, 5, 6||Textured||Increases Buster charge speed to 5.|
|Soul Time +1||5||Textured||Increases duration of Soul Unisons. Does not extend duration of Chaos Unisons.|
While the NaviCust never makes a real appearance in the MegaMan NT Warrior anime, some Extra Codes and Compression Codes that can be used in Mega Man Battle Network 3 appear hidden in some scenes. The Extra Code used in the anime to power up MegaMan's Aqua Custom Style is one of the few that are explicitly shown in use, rather than hidden in the background. The code in question is one that gives 200 additional HP without any drawbacks, though in the anime it is considered dangerous to use in certain situations.
In Rockman.EXE Stream, the “Press” program appears as an invention by Ivan Coolisky. In episode ##, he had been working on it for years before the company decided to shut down his project due to a lack of results. In a fury, he quits.