Mega Man Battle Network 6

The gameplay of Mega Man Battle Network 6 is largely identical to that of its predecessors. The player explores the real world through Lan Hikari and the Net through MegaMan.EXE. When Lan plugs his PET, a handheld computer, into a computer with an interface jack, he can upload MegaMan.EXE to the cyber network, allowing him to explore and fight viruses as random encounters.

When MegaMan encounters viruses, the screen shifts to a battle screen set on a six by three square grid. On the left half of the grid is MegaMan, and on the other half are his opponents. MegaMan has a relatively weak arm cannon, the Mega Buster, but his main weapon is Lan's library of battle chips, one-use-per-battle special attacks which grant various abilities, including simple attacks, attack enhancements, defensive effects, terrain transmogrification, or assistance from other NetNavis. Before battle, the player can construct a folder consisted of thirty battle chips, and each turn of a battle (measured by a timer bar at the top of the screen), the player is presented with a random selection of these chips. The player can send MegaMan up to five Battle Chips, after which the battle takes place in real time, with MegaMan, controlled by the player, attacking with his Mega Buster, dodging attacks, or activating battle chips from his queue.

Lan Hikari and his family have moved to Cyber City, and Lan becomes friends with Mick, a bad-tempered kid, and Tab, a boy who works at a Battle Chip store. He also learns about Copybots that allow Megaman to enter the real world. EXE decides to investigate. Here, Lan and MegaMan discovers that the Cybeast Gregar which is created out of the combination of multiple bugs (like Gospel) and Cybeast Falzar which created as a means to counter Gregar but went out of control, have something to do with a mysterious conspiracy.

EXE, captures one of the Cybeasts, MegaMan captures the other Cybeast into his body. Lan and MegaMan must fight WWW and stop whatever they're up to. EXE were the culprits of the conspiracy, but later in the end he admits that he was working for Dr. Wily himself.

Mega Man Battle Network 6 was developed for the Game Boy Advance (GBA) handheld video game console. Series writer Masakazu Eguchi stated that the decision to end the series with Battle Network 6 wasn't made when development started; the new project leader had desired to re-do many of the game's assets to make it feel "fresh", including the environment, until it was decided to be the series' conclusion due to the announcement of the Nintendo DS. The game was exhibited at Tokyo Game Show 2005, and released in Japan on November 23, 2005, with pre-orders for the game coming with a Battle Network-themed spoon, fork, and case.

Capcom and Takara later released the Navi Link System in February 2006, allowing players to dynamically adjust the stats of the Navi Data Chips for use in-game; the system was also compatible with the arcade game Rockman.EXE: Battle Chip Stadium, and Link PET_EX LCD game. Capcom further re-released the game on March 23, 2006, as the Rockman.EXE 6: Beast Link Gate DX Edition, a bundle that comes with the Beast Link Gate peripheral allowing players to be in permanent Beast Out, as well as use real Battle Chips. Despite being considered the final game (outside of re-releases), a gaiden game titled Rockman.EXE: Legend of Network released for Japanese mobile phones in 2006.

Both versions of the game placed in the Media Create top ten best-selling games list in Japan during their release week. Cybeast Gregar placed at number three with 107,099 units sold, while Cybeast Falzar placed at number six with 65,560 units sold. The two versions of the game sold nearly half a million copies combined during its first month in the region and a total of 610,000 copies by the end of Capcom's 2005 fiscal year. The game achieved solid sales outside Japan.

Both versions were released to mixed reviews, with Falzar and Gregar holding averages of 63 and 62 out of 100 on Metacritic respectively.

With the conclusion of the Mega Man Battle Network series, the development staff would start conceptualizing a follow-up to the series, later evolving into the Mega Man Star Force series; Star Force takes place 200 years later in the years of 22XX and focuses on radio wave technology, while maintaining several gameplay concepts introduced in Battle Network. As a whole, the Star Force series was not nearly as successful as Battle Network, which was attributed in retrospect to its perceived lack of changes; after the release of two sequels and Rockman.EXE: Operate Shooting Star (2009)–an enhanced DS port of the first Battle Network game released only in Japan–Capcom would discontinue development on a fourth entry due to poor sales.

The story of Mega Man Battle Network 6 was loosely adapted into the events of the Beast season of the anime series MegaMan NT Warrior; in Beast, Lan and several of his friends are transported to a parallel world in a continual Dimensional Area, areas where the Cyber World and real world meld together. Many of the characters in the season, including Baryl and Colonel, have different personalities that are more inline with their game counterparts, rather than the anime. Other characters and elements of Battle Network 6 not present in Beast would be adapted into the Beast+ season, as they also do in the last chapters of Ryo Takamisaki's manga.