Den Dome

Den Dome, stylized as DenDome in-game, known as Densan Dome (デンサンドーム) in Japan, is a location from DenTech City that appears in Mega Man Battle Network 4. It is the site of the first tournament Lan and MegaMan participate in the game. In the Red Sun version, they participate in the Den Battle Tournament. In Blue Moon, they take part in the City Battle Tournament. The colors of the area change depending on the version. For example, the inside of the stadium has red details for Red Sun or a purple blue design for Blue Moon.

Den Dome
Den Dome (DenDome in-game), known as "Densan Dome Front" (デンサンドームまえ) in Japan, is the outside area of the dome, with a Metroline station and a shop that sells healthy hotdogs (takoyaki in Japan). The hotdog shop has a Jack in port that plays a part in Mr. Match's scenario. The front of the train station has vending machines with juice at the cheap price of 60 Zenny. Depending on the version, the entrance has a different detail in front of the dome, having a sun for Red Sun and a moon for Blue Moon.

Alleyway
Alleyway, known as "Dome Hallway" (ドームろうか) in Japan, is the lobby of the dome. The main entrance leads to the spectator seats, while the back entrance leads to two waiting rooms, one for management staff and other for contestants. The doors from the waiting rooms have a card reader. The area also has flowers, a reception desk, and a vending machine that is a bit more expensive than the ones outside. The vending machine and the card reader from the contestants waiting room have jack in ports.

On the central flowers, there is a entry code for Mega Man Battle Chip Challenge to NetBattle against Roll.

Dome Waiting Room
Dome Waiting Room (ドームひかえしつ), shortened as DomeRoom and WaitingRoom in-game, is a waiting room for tournament participants, with tables, framework chairs, lockers, and faucets for them to use. It also has a tournament bracket showing the participants. The faucets have a filter with a jack in port.

On some trash near the lockers is the Lotto Number “46292983”.

Items

 * RegUP1 - Among the chairs in the room.

Stadium
The Stadium (スタジアム) is were the tournament is held, having a NetBattle Machine for NetBattlers to jack in and NetBattle.

Hotdog Comp
Hotdog Comp (HotdogComp), known as "Takoyaki Device's Computer" (タコヤキきの電脳) in Japan, is the computer of the hotdog fryer, which is used for maintenance. The Mr. Prog inside says that the hotdogs are prepared with kosher meat between yeast-free buns, topped with organic vegetables.

Items

 * HP Memory

Viruses

 * VolGear
 * Spikey

Vending Comp
Vending Comp (じはんきの電脳) is the computer of the vending machine inside the dome. The computer has lava and ice panels due to the machine serving hot and cold drinks. The machine has three Mr. Progs, two of them being responsible for each temperature and one to quickly deliver the selected drink.

Items

 * Recovery 50 S

Viruses

 * Shrimpy
 * Spikey

Card Reader Comp
Card Reader Comp (カードリーダーの電脳), CardComp in-game, is the computer of the card reader outside the waiting room for contestants. The Mr. Prog inside considers himself a state-of-the-art card reader program as he uses cards instead of keys, but as the door is left open during and after the tournament, he has nothing to do. The battle field from the area has some empty panels.

Viruses

 * Lark
 * Mettaur
 * MettEX

Water Supply Comp
Water Supply Comp (すいどうの電脳), WaterComp in-game, is the computer of the ultra-miniature filter attached to the faucets in the waiting room. The Mr. Prog inside cleans the water from the tap so it is safe to drink, warning that drinking water straight from the tap without a filder is not good.

Items

 * Fish (Navi Customizer Program)

Viruses

 * Shrimpy
 * ShrimpyEX
 * LarkEX

Dome NetBattle Machine Comp
Dome NetBattle Machine Comp (ドームＮＢマシンの電脳), DomeNBMComp in-game, is the computer of the NetBattle Machine inside the dome's stadium that is used by the tournament participants to NetBattle. The two Mr. Progs inside love fights.

Viruses

 * Mettaur
 * MettEX
 * Boomer

CyberTopComp
CyberTopComp is the computer from Tensuke's special CyberTop, which becomes available in the waiting room after his scenario. The Mr. Prog inside is spinning non-stop.

Viruses

 * Mettaur
 * MettEX
 * Dharma

Errors

 * The NPC that runs the hot dog stand is unique, no other character in the game shares her design.
 * When the trash can next to the vending machines near the Metroline is interacted with, it will state “Trash can with empty drinks cans...”, with an extra “S”.