View source for Missable content

{{nw}}
This page lists items and content in the series which can be permanently missed, or becomes substantially more difficult to obtain, if not obtained by a certain point in the game.

Note: due to the Chip Trader's low odds of getting the chip you need, chips which can otherwise only be obtained through the Chip Trader are also treated as missable on this page.

== Mega Man Battle Network 1 ==
These also apply to Rockman EXE Operate Shooting Star. 

=== Field Items ===
{| class="wikitable"
! '''Chapter #''' !! '''Missable Item''' !! '''Location''' !! '''Alternative ways to get'''
|-
|Ch. 1 || Recov10 A || Examine the dinner table in Lan's House before leaving for school. || Starting Folder (3 copies), Chip Trader
|-
|Ch. 6 || 10,000z || At the start of chapter, talk to Yai to receive a reward for the gift. || ---
|}

=== Mystery Data ===
In some dungeons, Mystery Data will disappear upon finishing the chapter, so your only chance to collect it is when going through the dungeon as part of the story. This applies to both MMBN1 GBA and OSS.

{| class="wikitable"
! '''Location''' !! '''Missable Item''' !! '''Alternative ways to get'''
|-
| Oven Comp 1 || ShotGun Q || Chip Trader
|-
| Oven Comp 1 || 400z || ---
|-
| Oven Comp 1 || Steal A || Undernet 6 Shop (max 3), Chip Trader
|-
| Oven Comp 1 || Sword B || Undernet 9 GMD, Chip Trader
|-
| Oven Comp 1 || 200z || ---
|-
| Oven Comp 2 || ShotGun Q || Chip Trader
|-
| Oven Comp 2 || 500z || ---
|-
| Oven Comp 2 || LilBomb T || Chip Trader
|-
| School Comp 5 || Cannon C || Internet 2 GMD, Internet 1 Shop (max 3), Chip Trader
|}

== Mega Man Battle Network 2 ==
{| class="wikitable"
! '''Chapter #''' !! '''Missable Item''' !! '''Location''' !! '''Alternative ways to get'''
|-
|Ch. 1 || "More viruses!" E-mail || Talk to the girl in the classroom. || --- 
|-
|Ch. 2 || Bubbler G || While helping for the barbecue, talk to the scientist in Camp at Okuden Valley. || 
|-
|Ch. 3 || Recov50 * || After getting the A License, talk to the Official at the counter of the License Office at Marine Harbor. ||
|-
|Ch. 4 || FireBlade R || When the goons infiltrates The Square, talk to the older Official in front of the elevator at the Lobby of Marine Harbor. ||
|-
|rowspan="4"| Ch. 5 || SilvFist I || When Lan has to go get a Passport, go read the note on Dad's PC. ||
|-
|Stolen Money || Talk to the blonde man in Netopia Airport. Delete his viruses to get your money back.
*Normal Mode: Fishy3, Fishy, Flamey
*Hard Mode: MegalianW, MegalianH, Snapper
|| 
|-
|Quake2 W, TreeBom1 *, and Sonicwav I || After making up with MegaMan, talk to Mr. Higsby, he will give these chips. || 
|-
|30 Guard * || When it's time to pay Jim for his info; After defeating the Navis in Netopia 3, talk to the drunk man in the alleyway. Then talk to the Electopian girl in front of Netopia Castle. ||
|-
|rowspan="4"| Ch. 6 || Repair L || Talk to the blonde man in the Economy section of the plane. || 
|-
|Souvenirs || Before heading to the airport, talk to the sunglasses man in Netopia Town to buy Broach, RoboX, and GoldRing.
|-
|10,000z, GutPunch D, and Recov150 P || When Lan returns to ACDC Town, give the souvenirs to Yai, Dex, and Mayl for each reward.
||
|-
|20 Guard * || Before heading to bed, talk to the boy running behind the house behind Lan's house in ACDC Town. ||
|}

== Mega Man Battle Network 3 ==

{| class="wikitable"
! '''Missable Item''' !! '''Location''' !! '''Alternative ways to get'''
|-
|300,000z || When doing the Legendary Tomes quest from the [[Job BBS]], after obtaining all 3 Tomes, go to the Teachers' Lounge and examine the statue to obtain '''300,000z'''. This must be done before the Tomes are turned in. || ---
|}

== Mega Man Battle Network 4 ==
=== Green Mystery Data ===
The contents of green Mystery Data vary for each difficulty. In some cases, depending on the difficulty and version of the game, green Mystery Data is the only (infinite) source of a chip code (aside from the Chip Trader).

For the chips listed below, once the player has moved on to the next difficulty, they can no longer obtain (infinite) copies of that chip, other than:
* Chip Trader
* Shop with limited stock
* Chip Order using a finite source of another code
* Version-specific virus drop

'''Bolded''' chips means the chip does not not have a * code which could be obtained instead.

{| class="wikitable"
! '''Difficulty''' !! '''Affected version''' !! '''Missable chip code''' !! '''GMD location''' !! '''Alternative ways to get'''
|-
|rowspan="21"| Game 1 || - || '''HiCannon C''' || Sharo Area || Higsby's Shop (max 3), Chip Trader
|-
| - || '''Vulcan2 H''' || Undernet 2 || Netopia Area Shop (max 3), Chip Order (limited), Chip Trader
|-
| Blue Moon || Thunder1 L || ACDC Area 2 || Billy LV.5~10 (Red Sun), BillyEX LV.7~10 (Red Sun), Chip Trader; can obtain Thunder1 * from BillyEX LV.9~S (both versions)
|-
| - || '''FlmLine1 *''' || YumLand Area || Chip Trader (extremely rare)
|-
| - || '''EnergBom N''' || Town Area 2 || Chip Order (limited), Chip Trader
|-
| - || '''EnergBom T''' || Netopia Area || Chip Trader
|-
| - || '''LongSwrd E''' || Town Area 2 || Chip Trader
|-
| - || '''LongSwrd L''' || Undernet 1 || Chip Trader
|-
| - || '''CustSwrd S''' || Undernet 1 || Town Area 2 BMD (3rd time), Chip Trader
|-
| - || '''Counter1 F''' || Town Area 3 || Chip Trader
|-
| - || '''Counter1 T''' || ACDC Area 3, Park Area 2 || Game Comp BMD (1st time), Chip Trader
|-
| - || '''Counter2 L''' || Undernet 6 || Meteor Comp 3 BMD (1st time), Chip Trader
|-
| Blue Moon || '''MokoRus1 M''' || Town Area 3 || Moloko LV.9~S (Red Sun), Chip Trader
|-
| - || '''CrakOut *''' || ACDC Area 1, Town Area 1, Undernet 4 || Starting Folder (3 copies), Chip Order (max 1), Chip Trader
|-
| - || '''Recov10 *''' || ACDC Area 1, Park Area 1 || Chip Trader (extremely rare)
|-
| - || '''Recov30 R''' || ACDC Area 3 || Town Area 3 BMD (1st time), Chip Trader
|-
| - || '''Recov80 B''' || NetFrica Area || Town Area 3 Shop (max 3), Chip Order (limited), Chip Trader
|-
| - || '''Geddon1 J''' || Undernet 4 || Chip Trader
|-
| - || '''Geddon1 K''' || Netopia Area || Chip Trader
|-
| - || '''Barrier *''' || Park Area 3 || Chip Trader (extremely rare)
|-
| - || '''Barr100 W''' || Undernet 6 || NetFrica Area BMD (1st time), Chip Trader
|-
|rowspan="2"| Game 1 & 2 || - || '''Recov50 *''' || YumLand Area (G1), ACDC Area 1 (G2), ACDC Area 3 (G2), Park Area 1 (G2) || Chip Trader (extremely rare)
|-
| - || '''Recov80 *''' || Undernet 1 (G1), YumLand Area (G2) || Chip Trader (extremely rare)
|-
|rowspan="19"| Game 2 || - || '''HiCannon E''' || ACDC Area 1 || Town Area 3 BMD (2nd time), Chip Trader
|-
| - || '''M-Cannon G''' || Sharo Area || Undernet 4 BMD (1st time), Toy Robot Comp 1 BMD (3rd time), Chip Trader
|-
| Red Sun || '''Thunder2 S''' || YumLand Area || Silly LV.7~10 (Blue Moon), SillyEX LV.7~10 (Blue Moon), Chip Trader
|-
| Red Sun || HeatBrth D || Sharo Area || Whomper LV.5~7 (Blue Moon), Wither LV.9~S (Blue Moon), Chip Trader; can obtain HeatBrth * from WeatherEX LV.9~S (both versions)
|-
| - || '''EnergBom E''' || ACDC Area 1 || Chip Trader
|-
| - || '''WideBlde S''' || Undernet 1 || Chip Trader
|-
| - || '''CustSwrd P''' || Town Area 4 || Chip Trader
|-
| - || '''Counter2 B''' || Park Area 2 || Chip Trader
|-
| - || '''Counter2 H''' || ACDC Area 3, Town Area || Chip Order (limited), Chip Trader
|-
| Red Sun || '''SidBmbo2 O''' || Undernet 6 || Kilbur LV.9~S (Blue Moon), Chip Trader
|-
| Red Sun || '''MokoRus2 U''' || Town Area 3 || Milko LV.9~S (Blue Moon), Chip Trader
|-
| Red Sun || '''BigHamr2 G''' || Undernet 2 || Gaia+ LV.9~S (Blue Moon), Chip Trader
|-
| - || '''Fanfare *''' || Undernet 4 || Chip Trader (extremely rare)
|-
| - || '''Discord *''' || Undernet 4 || Chip Trader (extremely rare)
|-
| - || '''Timpani *''' || Undernet 4 || Chip Trader (extremely rare)
|-
| - || '''Silence *''' || Undernet 4 || Chip Trader (extremely rare)
|-
| - || '''Guard2 *''' || Town Area 1, NetFrica Area || Mettaur2EX LV.9~S (G2), Chip Trader (extremely rare)
|-
| - || '''Geddon2 T''' || Netopia Area || Chip Trader
|-
| - || '''Barr100 Q''' || Park Area 3 || Chip Order (limited), Chip Trader
|}

=== Viruses ===
For most viruses, lower versions can be encountered even on the highest difficulty (Continue 3+). However, there are a few viruses that only appear on a specific difficulty. As a result, this may lock you out of obtaining certain chip codes, which can otherwise only be obtained (very rarely) from the Chip Trader.

'''Bolded''' chips means the chip does not have a * code version which could be obtained instead.

{| class="wikitable"
! '''Difficulty''' !! '''Virus''' !! '''Missable chip codes''' !! '''Alternative ways to get'''
|-
|rowspan="5"| Game 1 only || GaiaEX || - || All codes can be obtained from Gaia and Chip Order
|-
| CirKill || - || All codes can be obtained from CirKillEX
|-
| BomBoy || - || All codes can be obtained from BomBoyEX
|-
| WindBox || - || All codes can be obtained from WindBox2 and WindBox3
|-
| VacuumFan || - || All codes can be obtained from VacuumFan2 and VacuumFan3
|-
|rowspan="9"| Game 2 only || Mettaur2EX || '''Guard2 *''' || Chip Trader (extremely rare)
|-
| SillyEX || - || All codes can be obtained from Silly
|-
| Gaia+EX || '''BigHamr2 W''' || Chip Trader
|-
| KilburEX || '''SidBmbo2 H''' || Chip Trader
|-
| Webby || WhitWeb2 E<br/>WhitWeb2 Y || Chip Trader; can obtain WhitWeb2 * from WebbyEX LV.9~S
|-
| CirCrush || - || All codes can be obtained from CirCrushEX
|-
| MilkoEX || - || All codes can be obtained from Milko
|-
| WindBox2 || - || All codes can be obtained from WindBox3
|-
| VacuumFan2 || - || All codes can be obtained from VacuumFan3
|}

=== WaterGod Comp Gold Mr. Prog ===
{{Main|WaterGod Comps}}
The WaterGod Comp can only be accessed if Lan fights Paulie as an opponent in the Red Sun / Blue Moon Tournament. In the WaterGod Comp, a gold Mr. Prog known as the [[WaterGod_Comp_Maze#Gold_Program|WaterGod Program]] has a low chance to spawn upon jacking in to the comp. It will give up to 5 rewards from a pool of 8, depending on the current difficulty. As such, certain BattleChip rewards for Game 1 and 2 can be missed.

Whether Paulie will appear in the Red Sun / Blue Moon Tournament, and which rewards will be given by the WaterGod Program, are both determined at the start of the game. Therefore, the player has no control over this and getting the chips below is simply up to luck. Additionally, Paulie cannot appear in both Game 1 and 2.

{| class="wikitable"
! '''Difficulty''' !! '''Missable chip''' !! '''Alternative ways to get'''
|-
|rowspan="2"| Game 1 only || WideBlde C || [[Elec Tower Comp 2]] BMD (2nd time), Chip Trader
|-
| Lance A || Chip Trader
|-
|rowspan="4"| Game 2 only || Geddon2 Y || Chip Trader
|-
| Barr200 I || Chip Trader
|-
| MegEnBom W || Chip Trader
|-
| VarSwrd J || Chip Trader
|}

== Mega Man Battle Network 5 ==
Due to the removal of Ship Comp 1 in the English GBA version of the game, a respawning location for “Thunder L” is no longer available.
{| class="wikitable"
! '''Chapter #''' !! '''Missable Item''' !! '''Location''' !! '''Alternative ways to get'''
|-
|Ch.3 || {{5EN}} Thunder L || Gold Cloud (Oran Area 1) || Chip Trader
|}

=== Mega Man Battle Network 5DS ===
In the BN5DS version of the game, some features will be skipped due to features using the [[W Slot]] function.

{| class="wikitable"
! '''Chapter #''' !! '''Missable Item''' !! '''Location''' !! '''Alternative ways to get'''
|-
|Ch. 2 || BnusFldr (ExtraFolder) || When you receive the NaviCust E-Mail and already have BN5Fldr from the W Slot. || Available from a Navi in Kitchen Comp accessed via ACDC Area 2.
|}

[[Category:Mega Man Battle Network]] [[Category:Mega Man Battle Network 2]] [[Category:Mega Man Battle Network 3]] [[Category:Mega Man Battle Network 4]] [[Category:Mega Man Battle Network 5]] [[Category:Side Quests]]