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Gravadactyl is a fusion alien that never made it into the show. He is the combination of Gravattack and Astrodactyl's DNA. He can only be accessed by using the Biomnitrix.


Gravadactyl has the body shape of Astrodactyl, which is a cross between a Pterodactyl and a glider, but is made of living rocks, like Gravattack. He is a slender, reddish-brown alien with rocky skin, a giant beak-like mouth with teeth that are also made of rocks, and a molten lava planet core at the center of his body. He has tan-colored wings that resemble a glider in appearance.

He wears black shorts with green stripes and a silver belt with the Biomnitrix symbol on it.

Powers and Abilities

Being part-Galilean, Gravadactyl should control gravity to manipulate the weight and motion of objects, allowing him to levitate and move targets in the air, much like Gravattack. He should also possesses enhanced strength and durability.

Being part-Astrodactyl's species, Gravadactyl should fly at high speeds through the aid of his wings providing stability for this ability. He can also use star power and do energy attacks.

Gravadactyl should also be able to survive in the vacuum of space, as both Gravattack and Astrodactyl can do so.


If Gravadactyl were to take large amounts of damage to his core, it could cause him immense pain. This would also make him enter meltdown and explode, which can be dangerous enough to destroy the entire area he is in.


Gravadactyl's name is a combination of Gravattack and Astrodactyl.


  • Gravadactyl was designed by Tom Perkins, like all other Biomnitrix fusions.[DJW 1]
    • However, the design is only concept art, as Gravadactyl never made it into the show.
  • Gravadactyl and XLRG were the only concept Biomnitrix fusions that were actually drawn. The others were just "names on the board".[DJW 2]


Derrick J. Wyatt

Introduced in Ben 10 ArctiguanaBlitzwolferBuzzshockCannonboltDiamondheadDittoEye GuyFour ArmsFrankenstrikeGhostfreakGrey MatterHeatblastRipjawsSnare-ohSpitterStinkflyUpchuckUpgradeWay BigWildmuttWildvineXLR8
Introduced in Alien Force Alien XBig ChillBrainstormChromastoneEcho EchoGoopHumungousaurJetrayLodestarNanomechRathSpidermonkeySwampfire
Introduced in Ultimate Alien AmpfibianArmodrilloChamalienClockworkEatleFasttrackJuryriggNRGShocksquatchTerraspinWater Hazard
Introduced in Omniverse AstrodactylAtomixBall WeevilBloxxBullfragCrashhopperFeedbackGravattackGutrotKickin HawkMole-StachePesky DustThe WorstToepickWalkatroutWhampire
Future Aliens SandboxShellheadSnakepit
Ultimate Aliens AlbedoArctiguanaBig ChillCannonboltEcho EchoGravattackHumungousaurRathSpidermonkeySwampfireWay BigWildmutt
Fusion Aliens Atomic-XBig ChuckCrashockerDiamond MatterFourmungousaurHeat JawsHumungoopsaurStink ArmsUprigg
Concept Fusion Aliens GravadactylXLRG
Other Aliens in Official Media AntigraviteslaBob the BlobCartoon Network AlienEon (Retconned)MoyoInvinciblePlantapocalypsePortalerRocksShadowmanSquidstrictorStretcheleo