It is the Reactor of the Coreship which attacked the player and his fleet at the beginning of the game.
The Core Reactor attacks the player with its guns on the top and bottom which can be destroyed. It also makes electricity blasts from the ceiling and the floor. Finally, it will pull or repel the player from itself when it spins around while doing the two aforementioned attacks.
|Game Boy Gradius games|
|Ships||Vic Viper • Coreship|
|Nemesis Stages||Volcano • Cell • Moai • Bone • Fortress|
|Gradius: The Interstellar Assault Stages||Remains • Battleship Interior • Asteroid Belt • Planet Surface • Fortress|
|Nemesis Bosses||Volcano • Super Big Core • Zub Rush • Crawler • Zigzag • Striker • Amb • Reckless • Mother Computer Z|
|Gradius: The Interstellar Assault Bosses||Infected Statue • Core Reactor • Volcano Core • Fortress Gate • Guardian Core • Escape Ship|