Big Core MK IV is the final boss of the 1st boss rush in stage 2 of Gradius V. This one has four cores to destroy and builds upon Big Core MK III by having detachable arms that shoot.

Attack Patterns

Big Core MK IV attacks in several patterns. First, the arms will detach and shoot waving energy beams. Along those beams will be giant plasma balls that will shrink if continuously shot. After those pass, smaller energy balls will travel along the beams and shoot lasers up/down or left/right depending on the configuration. During this phase, homing lasers will also be shot at you. After this phase, the arms will reattach then be released, this time shooting the beams up and down. The main pattern is the same.

In Loop 2 or higher, it will fire a steady laser stream. They restrict the player's movement, making aiming at the top and bottom cores difficult.


Gradius V
Ships Vic Viper T-301
Stages Planet Gradius Satellite OrbitPlanet Gradius City Sky APlanet Gradius Urban Underground HierarchyBacterian Cell CenterAsteroid Front BaseBacterian Multiplication PlantBacterian Fortification CenterPlanet Gradius City Sky B
Bosses Big Core Rev. 1.2Venom (Lower) • Death MK IIITetranBig Core MK IIBig Core MK IVGround SpiderHuge HeartBlaster Cannon CoreRolling CoreCircle CoreBig Core MK IIICovered Core MK IIBeaconKeeper's CoreElephant GearVenom (Upper)
Core Warships
Big Cores Big Core MK IBig Core Rev. 1.2Big Core MK IIBig Core MK II KaiBig Core MK IIIBig Core MK IV
Big Core variants BeaconBlaster Cannon CoreBubble CoreCircle CoreCoreshipCrater CoreCrystal CoreDellinger CoreDesert CoreHeaven's GateJuggler CoreLaser CoreLizard CoreNeo Big CorePerla MeraldaRexion CoreRolling CoreShining CoreSuper Big CoreTerra CoreVanishing CoreViva CoreGenocide CoreOdin Core
Core-style bosses Abaddon WarshipBubble EyeCovered CoreCovered Core MK IIDead EndKrakenMayhem WarshipMetal SlaveMisfit WarshipQueensrÿcheRiot WarshipPlate Core
Pseudo-Cores DeathDeath MK II (DeathDouble) • Death MK IIIBeta CoreNobilTriple CoreCrash Bam
Tetran variants Tetran (Zylom) • Covered TetranCrystal Core D-X02Laser TetranTenny Rop