This section is under construction.

The information may not be complete or 100% accurate.

This page lists the changes made in Mega Man Battle Network Legacy Collection compared to the original GBA games.

Mega Man Battle Network 4

In the cutscene after defeating TopMan in the tournament, a clapping sound effect was added when the crowd starts clapping. This sound effect did not exist in the GBA version.
(JP) When using a 3-Chip Trader while MegaMan is not in the PET: if you run out of chips after making a trade and try to trade again, in the Japanese GBA version, the game would tell you you need 10 chips. In Legacy Collection, it correctly states that you need 3 chips.

Mega Man Battle Network 6

In the GBA version, the incident music would continue to play after beating the main story. In Legacy Collection, it now plays the normal area music again after you reload your save.
A bad words check is now applied to Folder names. This was presumably added because Folders can now be shared online with strangers.
(EN) The Puffy virus family is renamed to Diodon. This was presumably done since there was already a different virus family named Puffy in the earlier MMBN games. Both viruses are featured on a Patch Card in MMBN6, so having them both named Puffy would have been confusing.
In the cutscene where Lan and Mick meet the penguin at school, after MegaMan says "L-Lan!!?", you had to press the A Button twice to advance the scene (after the first press, the sound would fade out but the scene would not continue). In Legacy Collection, you only need to press the A Button once, and the scene will continue automatically along with the sound fading out.
(JP) In the Japanese GBA version, PulseBulb's description in the Virus Battler stated that its attack inflicts Confuse. In Legacy Collection, it correctly states that it inflicts Paralyze.
(JP) In the Japanese GBA version, the P.A. Memos for Wide Burner stated that you need 3 Wide Burner chips. In Legacy Collection, it correctly states that you need 3 Hell's Burner chips.
(JP) A typo was fixed in the request acceptance mail for the "Time Capsule" request.