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Mega Man Battle Network 4

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This page details bugs of Mega Man Battle Network 4.

WoodMan Scenario Bug on Nintendo DS#

During WoodMan's scenario in the second tournament, the game might slow down severely when played on an original Nintendo DS if a menu or battle is accessed in Park Area. This occurs on DS' hardware level because the game fails to check the need to reset animation frame reset index when Wood Towers are there, resulting in an attempt to load a non-existent sprite from an invalid memory address. The DS hardware treats this data as a continuous sprite data, resulting in the near-hang slowdown as the game attempts to wrap back to mapped, valid memory.

Nintendo acknowledged this bug on their website, although only Blue Moon is credited; the bug can also occur on Red Sun.

(Source: The Rockman EXE Zone)

Certain Navi Chips programmed incorrectly, causing the game to freeze; like the WoodMan Scenario bug, this is exclusive to early emulations (such as older versions of Visual Boy Advance; until v1.7). These bugs were also fixed in-software in the Virtual Console release and the Legacy Collection. The following chips are affected:

  • GutPnch1/2/3
  • HawkCut1/2/3
  • GutsMan
  • WindMan
  • FireMan
  • AquaMan

(Source: Cut and Obscure Video Game Content)

Unset Record Names#

Japan

US (w/ Fix)

US

US (Layer BG 2 Off)

The unset names '---' being invisible in the International version. The invisible names viewable when disable Layer BG 2, but that text is empty space. The "-" mark is moved to value 49 in the international version.

Memory Address

Value

020001E0~020001EF
(Roll, GutsMan, WindMan, FireMan)

82 82 82 00 82 82 82 00 82 82 82 00 82 82 82 00

 
Change the record names to '---'
420001E0 4949
00000016 0004
420001E2 0049
00000016 0004

Secret Chip Description#

Memory Address

Emulation version

Value

02000520 (Duo)
0200057C (PrixPowr)

Visual Boy Advance v1.6

7E 7E 02 00 E5 00 7E 7E

Visual Boy Advance v1.5.1 or v1.7 or later

02 00 7E 7E 7E 7E E5 00

The value 7E is "?" mark in the Japanese version and is an unused text slot in the international version. The "?" mark is located to value 45 in the international version.

The secret chip description errors can be fixed using the cheats below, regardless of emulation version.

Duo (Giga)
82000520 0002
82000522 4545
82000524 4545
82000526 00E5
82001772 4545
82001774 4545

PrixPowr (Mega)
8200057C 0002
8200057E 4545
82000580 4545
82000582 00E5
82001782 4545
82001784 4545

Folder

Battle

BurnerMan Hitbox Bug#

Destroying BurnerMan's torches while they are attacking causes the hitbox to remain for a certain time, damaging the player; this bug is also present in 4.5, but is much harder to replicate due to its automated movement.