Eden

Eden (エデン) is a mysterious giant space fortress from the Mega Man Legends series with a powerful weapon and around 10000 workers aboard.

Mega Man Legends
Near the end of Mega Man Legends, MegaMan Juno contacted Eden to initiate the Carbon Reinitialization Program in Kattelox Island and eliminate all humans in the island. After Juno's defeat, he creates a back-up of his memory in Eden and the reinitialization is ready to start, but Data orders to delete Juno's back-up and cancel the program. Eden returns to its previous coordinates after this, and isn't seen again.

Namco × Capcom
In the end of Chapter 43 of the crossover Namco × Capcom, Juno got the God's Eye in Dycroft to use its energy on Eden, giving it enough power to dispose all "Decoys" (humans) on the planet. In Chapter 44, the party goes to Eden with the Gesellschaft to recover the God's Eye and stop Juno and Grand Master Meio. In the Eden's Control Room, the party fights against some Gnosis (KOS-MOS uses the Hilbert Effect to the party fight against them) and Reaverbots, and more enemies appear later, including Juno, Grand Master Meio and Saya, and they reveal their plans. Juno and the others are destroyed in the battle, and the party uses the Control Room to send Eden and everything inside it, including the God's Eye, deep into space to never be seen again. They return to Earth thinking the battle is over, but Saya survived and fights against them in the last chapter.

Enemies in Namco × Capcom
Enemies in Chapter 44, in the Eden's Control Room.

First wave:
 * Fire Gorbesh
 * Stribog
 * Perun

Second wave:
 * Q-Bee
 * GamaGael
 * Death
 * Pistol Daimyo
 * Waya-Hime (Replica)
 * Benjamin Ōkubo Hikozaemon
 * Armored Moo - Gold
 * Giant Shielded Moo
 * Glibz Phalanx
 * Raijin
 * Fūjin
 * Skeleton

Third wave:
 * MegaMan Juno
 * Druk
 * Shturm
 * Shturm Jr.
 * Rock (Doppel) (Mega Man Volnutt, Doppelgänger)
 * Ryu (Doppel)
 * Chun-Li (Doppel)
 * Karin Kanzuki (Doppel)
 * Hiryu (Doppel)
 * Arthur (Doppel)
 * Bravoman (Doppel)
 * Gilgamesh (Doppel)
 * Jin Kazama (Doppel)
 * Valkyrie (Doppel)

Fourth wave:
 * Grand Master
 * Hien
 * Solo
 * Ton Pooh
 * Nan Pooh
 * Saya
 * Katana
 * Dokumezu
 * Dokugozu

Trivia

 * Eden is the name of a garden described in the biblical book of Genesis as being the place where the first man, Adam, and his wife, Eve, lived after they were created by God.