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Mega Man Battle Network Legacy Collection finally brings the series to modern platforms in two volumes. Includes some minor quality of life changes, previously cut content from Japanese releases, and online netbattling.
Notably, the PC release was packed with Denuvo, making digging and modding difficult (Capcom removed the DRM from the game eventually).
The collections seem to contain the original GBA ROMs in MegaMan_BattleNetwork_LegacyCollection_Vol?/exe/data/*.dat. These files are just compressed files that can be freely explored. For example, MegaMan_BattleNetwork_LegacyCollection_Vol2/exe/data/exe4.dat/exe4/rom_e.srl will net you a file identical to the previously-available "Battle Network 4 Red Sun (U)" ROM. Opening the ROM Info in mGBA will show this:
Game name: Mega Man Battle Network 4 - Red Sun (USA)
Internal name: MEGAMANBN4RS
Game ID: AGB-B4WE
File size: 8388608 bytes
CRC32: 2120695c
While most of CRC32 from extracted ROMs seem identical with ROMs available online, Japanese version of Rockman EXE 2 ROM located at MegaMan_BattleNetwork_LegacyCollection_Vol1/exe/data/exe2j.dat/exe2j/rom.srl is an exception, which has different CRC32 from existing Rev 0 and Rev 1 ROM:
Internal name: ROCKMAN_EXE2
Game ID: AGB-AE2J
File size: 8388608 bytes
CRC32: 46eed8d
It looks like the launcher uses the ROMs for a few things, but not everything:
Replacing Battle Network 2 with the Battle Network 1 ROM will let you go to the title screen - Battle Network 2 music plays and Legacy Collection: Battle Network 2 graphics show up - but crashes after choosing New Game.
Replacing Battle Network 2 with the leaked prototype ROM will crash it after starting Battle Network 2 up - it won't even proceed to the title screen.
Replacing Battle Network 2 with a French translation patched ROM will successfully boot the game, but no text appears to be changed, suggesting that all of the text is stored in Legacy Collection.
This needs some investigation. Discuss ideas and findings on the talk page.
Some audio files are stored separately from their respective GBA ROMs. MegaMan_BattleNetwork_LegacyCollection_Vol?/exe/audio/*.bnk files appear to packed with Audiokinetic's Wwise middleware, but it is possible that the files are encrypted.
Grammar issues, typo errors, and mistranslations across multiple games (e.g. Battle Network 4's "MegaMan, it's viruses busting time!", "Leg's go Lan!", "What a polite young man she was!") are not fixed, despite assurances from Capcom regarding the games receiving new translations. It is possible that the translation talk was only referring to the never-before-released Chinese versions of the games. However, there are a FEW fixes to the English text.
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