ACDC Area

ACDC Area, known as Densan Area (デンサンエリア) in Japan, is the internet area from DenTech City, including ACDC Town. It can be explored by the player from the beginning of most games in the Mega Man Battle Network series and is connected to several other areas. ACDC Area is essentially the "stage one" of the series, as it houses very weak viruses such as Mettaurs and Canodumbs. In each game, the overall layout of the area changes greatly, but the area has a signature blue coloration.

Lan Hikari's computer exits into ACDC Area 1, while the locations of Yai's, Dex's, and Mayl's computer varies across the series.

Mega Man Network Transmission
ACDC Area, named Den Area in this game, is the first area accessed by MegaMan.

Bass can be found in Den Area 3 after defeating all other NetNavis in the game and obtaining their Navi Chips.

Mega Man Battle Network 6
ACDC Area isn't the first location available in the game and contains relatively strong viruses. As the bulletin board for the area reveals, this is due to Lan and MegaMan moving to Central Town and not being available to bust viruses, causing stronger breeds to arise.

Other appearances
A modified version of the Den Area from Mega Man Network Transmission appeared in Rockman X DiVE as the event stage Network Guardian, available from November 25 to December 8, 2020. Instead of Deep Elements, this stage has a score, which the Player can increase by collecting Zenny (10 points each), Battle Chips (50 points) and Mystery Datas (100 points). In the end of the area the Player faces Cyber Peacock in an area similar to the one Bass is fought.