Underground

The Underground is a location from the MegaMan Battle Network series. It is a giant hole in Central Area and is where the Cybeasts were sealed when they rampaged on the Net. There is a BugFrag located there. The Underground is a two-part area with a giant platform in the second. Whenever a character enters, there is a large roar.

Plot
After MegaMan is taken over by the Cybeast, he retreats to the Underground but is followed by the Cross NetNavi that Lan chooses. However, the cybeast's presence has caused evil spirits to flood the Underground. A Netpolice unit is sent down but defeated. The Cross Navi uses the Soul Weapons to defeat the Evil Spirits and makes his way to the giant platform in Underground 2. There, the Cross Navi does battle with Beast Out MegaMan and barely wins. CircusMan.EXE arrives and attempts to steal MegaMan but fails. Then Colonel.EXE arrives and fights MegaMan but retreats after losing.

Trivia
Later, Bass.EXE comes and gains the power of the Cybeasts by absorbing fragments of their data. He revives a copy of Beast Out MegaMan but MegaMan defeats it. Then Bass attacks MegaMan himself but loses. It is the last story-triggered battle against Bass (he can be randomly found in the Graveyard after defeating him here).