This stage has many secrets on all floors and only the true door does not have secrets. This stage consists of many levels, which you get to them by the lift. The exit is not on the top, and could be easily confused. During the level doors will become locked and may sometimes pit you with an enemy, find the switch or both. Some have hidden doors if a certain requirement is met, such as defeating an enemy.
The stage ends with Samus and Pikachu bursting into the bomb factory, where they find the Ancient Minister, along with an army of R.O.B.s and Subspace Bombs. They prepare to fight, but the Ancient Minister looks resentful and doesn't want to fight, much to Samus and Pikachu's confusion.
- The only music used for most of the place is Norfair.
- Although, in some rooms, Multiplayer (Metroid Prime 2) plays.