Mega Man Battle Network 4: Blue Moon
Game Boy Advance · 2003
About this game
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.
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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: Red Sun .
You can also trade different Battle Chips (some are exclusive to particular versions) and Net Battle with a friend.
About Game Boy Advance
Nintendo's Game Boy Advance (2001) offered near-SNES-level graphics in a handheld and became a home for excellent ports as well as original titles across nearly every genre. GBA cartridges are generally durable and plentiful, making it an approachable platform for new collectors, though a few late-release RPGs and limited exclusives have become genuine chase items.
Gamevaro tracks Mega Man Battle Network 4: Blue Moon for Game Boy Advance with separate market values for loose, complete-in-box (CIB) and factory-sealed copies, sourced from real eBay sales. Prices also vary by region — PAL, NTSC-U and NTSC-J releases of the same game often sell for different amounts due to print run sizes and regional collector demand.
Adding Mega Man Battle Network 4: Blue Moon to a Gamevaro collection takes seconds — search by title or scan the box barcode, and the app fills in cover art, release details and current pricing automatically. This GBA release dates back to 2003.
Price history
Market values by condition
PAL
NTSC-U
NTSC-J
Recent sales
| Date | Type | Region | Price |
|---|---|---|---|
| 2026-07-16 | New (sealed) | NTSC-U | €196.60 |
| 2026-07-16 | Box Only | NTSC-U | €39.41 |
| 2026-07-16 | Manual Only | NTSC-U | €9.64 |
| 2026-07-16 | Item only | NTSC-U | €12.23 |
| 2026-07-16 | Complete in Box | NTSC-U | €66.96 |
| 2026-07-16 | Graded New | NTSC-U | €596.51 |
| 2026-07-13 | Complete in Box | NTSC-U | €66.82 |
| 2026-07-13 | New (sealed) | NTSC-U | €196.19 |
| 2026-07-13 | Box Only | NTSC-U | €39.33 |
| 2026-07-13 | Graded New | NTSC-U | €595.26 |
| 2026-07-13 | Manual Only | NTSC-U | €9.62 |
| 2026-07-13 | Item only | NTSC-U | €12.20 |
| 2026-07-12 | Box Only | NTSC-U | €39.33 |
| 2026-07-12 | Item only | PAL | €16.01 |
| 2026-07-12 | Manual Only | NTSC-U | €9.62 |
| 2026-07-12 | Complete in Box | PAL | €62.21 |
| 2026-07-12 | New (sealed) | NTSC-U | €196.19 |
| 2026-07-12 | Graded New | NTSC-U | €595.26 |
| 2026-07-12 | Graded New | PAL | €136.66 |
| 2026-07-12 | Box Only | PAL | €24.88 |
| 2026-07-12 | Item only | NTSC-U | €12.20 |
| 2026-07-12 | New (sealed) | PAL | €124.23 |
| 2026-07-12 | Manual Only | PAL | €15.56 |
| 2026-07-12 | Complete in Box | NTSC-U | €66.82 |
| 2026-07-10 | Item only | NTSC-U | €12.66 |
| 2026-07-10 | Box Only | NTSC-U | €39.32 |
| 2026-07-10 | Complete in Box | PAL | €62.19 |
| 2026-07-10 | New (sealed) | NTSC-U | €196.69 |
| 2026-07-10 | New (sealed) | PAL | €124.18 |
| 2026-07-10 | Complete in Box | NTSC-U | €61.49 |
Market insights
Rarity & condition
Mega Man Battle Network 4: Blue Moon has a steady sales history on the tracked marketplaces, meaning enough copies circulate to establish a reliable market price.
Complete-in-box (CIB) copies typically command a premium over loose cartridges/discs because the original box and manual are more fragile and get discarded or damaged over time — fewer complete sets survive.
Frequently asked questions
How much is Mega Man Battle Network 4: Blue Moon worth?
Mega Man Battle Network 4: Blue Moon for Game Boy Advance is currently worth €21.15 loose, €62.21 complete in box, and €124.23 factory sealed. Prices are based on real sales and update regularly on Gamevaro.
Is Mega Man Battle Network 4: Blue Moon rare?
Mega Man Battle Network 4: Blue Moon has a steady sales history on the tracked marketplaces, meaning it trades hands regularly and isn't considered particularly rare.
What's the difference between loose, CIB and sealed for Mega Man Battle Network 4: Blue Moon?
Loose means cartridge or disc only, CIB (complete in box) includes the original box and manual, and sealed means factory-sealed and never opened. For Mega Man Battle Network 4: Blue Moon, loose is €21.15 and CIB is €62.21 — CIB commands a premium because original boxes and manuals are fragile and often don't survive.
Is Mega Man Battle Network 4: Blue Moon worth more in PAL or NTSC?
The PAL version of Mega Man Battle Network 4: Blue Moon is currently worth €21.15 loose, versus €17.07 for NTSC-U. Regional price differences usually come down to print run size and regional collector demand.
Ratings & Reviews
Also on other platforms
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