Big Core Duo

The Big Core Duo (ビッグコア・デュオ Biggu Koa Dyuo^?) is a boss in Gradius ReBirth.

Details[]

The Big Core Duo is the first and fourth boss in the game. It is a specially-modified version of the original Big Core. This Big Core starts with the same old Quad Shot attack, but, in a second phase that comes when fought in the fourth stage, it then transforms into a six-shot-firing and laser-sweeping havoc of a Core warship.

Attack patterns[]

Note: *All attack names except Beam Shot are purely conjectural.*

At first, the boss will be a normal Big Core and attack as it always has. However, when fought as the boss of the Wasteland, after its defeat, it will take off to the background, and change into a second form by flipping over and opening its sides.

Normal Form

Beam Shot: Big Core Duo, when disguised as Big Core MK I, will shoot its iconic four-shot laser while moving up and down.

Duo Form

"Beam Shot Duo": When it revealed its true form, Big Core Duo will fire a spread of six lasers at the player four times.
- "Laser Sweep": Big Core Duo will fire a pair of powerful, continuous lasers that will sweep the screen with its movement.

Trivia[]

In the updated version of the game, the boss music will change to "Fighter Blood", an arrangement of the Nemesis 3 boss theme, for the second form.

See also[]

Big Core MK I

Gradius ReBirth
Characters	James Burton (Vic Viper) • Gaudie • Venom
Stages	Volcano • Cell • Moai • Wasteland • Antichthon
Bosses	Volcano • Iron Maiden • Big Core Duo • Zub Rush • Crawler X • Moai Orb • Re-Bone • Enigma • Electronic Cage MK2 • Xaerous Brain

Core Warships
Big Cores	Big Core MK I (Old Big Core) • Big Core Custom • Big Core MK-I Rev.2 • Big Core MK II • Big Core MK II Kai • Big Core MK III • Big Core MK IV
Big Core variants	Beacon • Berserk Core • Big Core Duo • Big Core DX-01 • Big Core Orthos • Big Core Prometheus • Blaster Cannon Core • Boost Core • Bubble Core • Circle Core • Coreship • Crater Core • Crystal Core • Dellinger Core • Desert Core • Heaven's Gate • Juggler Core • Laser Core • Lizard Core • Mirrored Core • Neo Big Core • Parasite Core • Perla Meralda • Planet Core • Rexion Core • Rolling Core • Serpent Core • Shining Core • Super Big Core • Terra Core • Vanishing Core • Genocide Core • Odin Core
Core-style bosses	Abaddon Warship • Bolboros • Covered Core • Covered Core MK II • Dead End • Deltatry • Kraken • Mayhem Warship • Metal Slave • Misfit Warship • Queensrÿche • Riot Warship • Plate Core
Pseudo-Cores	Death • Death MK II (DeathDouble) • Death MK III • Beta Core • Nobil • Tri-Pod Core • Triple Core • Crash Bam
Tetran variants	Tetran (Zylom • Tetran Sweeper • Tetran Scavenger) • Covered Tetran • Crystal Core D-X02 • Laser Tetran • Tenny Rop
Parody Cores	Candy Core • Decoration Core • Decoration Core MK II • Viva Core