Template:Infobox Boss
Background
The Nucleus is the boss of level 6 in the original Gradius. It consists of a pink, amoeba like core, and a large crystal structure which forms the rest of the level it lives in.
Attack Patterns
The first attack it uses is spraying projectiles from two vents on each side of it's head, which it does constantly. It will also constantly create Amoebas to attack you.