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The Yorogaton Chimera (ヨロガトンキメラ Yorogaton Kimera?) is the first boss in Gradius IV.


As with the mythical Chimera beast, it has three heads. It can morph into four different forms, the second form being based off which head is dealt more damage. Upon defeat of each form, it converts into the same gooey substance previously found throughout the stage. As it dies, it makes one final roar and dissipates.

Attack patterns

First form

Yorogaton Chimera.png

Each head fires in either spreads or single fireballs. The fireballs can be destroyed.

Its weak points are the heads.

White head

Gradius 4 Boss 1 - White Head.png

The easiest of the three forms. The turtle heads occasionally fire lasers from their mouths and the whole monster launches spores from its back. The spores can be destroyed by the turtle's beams or by the player - the former causing them to explode in a six way spread. They can also explode by themselves.

Its weak points are the heads.

Blue head

Chimera - Blue Head.png

The hardest form to trigger (due to the blue head being the middle head). This form is predictable. Its three eyes can fire slow moving and destructible projectiles, and can occasionally try to grab you.

Its weak points are the eyes.

Green head

Green Head Chimera.png

This form is the most unpredictable. It constantly spawns indestructible insects that rotate around the boss and spread out, depending on the direction the boss is spinning. They change direction with the boss and the player must also be wary of insects that have left the screen. This form is strangely mechanical in comparison to the other forms.

Its weak points are the wings.

Gradius IV: Fukkatsu
Ships Vic Viper
Stages Liquid MetalPlantBubbleMagmaMoaiCellHigh SpeedBoss RushFinal Fortress
Bosses Yorogaton ChimeraDendrodiumBubble CoreGilladorAlpha/OmegaBerialRolling CoreVanishing CoreBig Core MK IIICovered TetranBerserk CorePlanet CoreBloody GateCrab-IIGofer
Organic bosses
Space entities NucleusIntruderPhoenix (Geezer Butler)GoliathBubble EyeWyvernVulture DragonBlizzard CrawlerYorogaton ChimeraGilladorVolleoneDoomLynyrd SkynyrdTriumph KicksGawGigaKiller Dwarf
Body horror AbadonGolemZylomBig EyeGregolMad SkinBrachion EyeBiterBerialHuge HeartCrawler (X) • Infected Statue
Plantlife Choking WeedStinger KidHunter FangGiga's RoseDendrodiumHans Naughty