|Species||½ Tetramand ½ Lepidopterran|
|Body||Four-armed humanoid with wings|
|Powers and Abilities|
|Abilities|| Limited Flight|
|Voice Actor||Dee Bradley Baker|
|First Appearance||Dr. Animo and the Mutant Ray|
Stink Arms is a fusion alien that made its first debut in Dr. Animo and the Mutant Ray. Stink Arms is a fusion of Four Arms and Stinkfly due to an Omnitrix malfunction. He cannot be accessed unless the faceplate of the Omnitrix is broken.
Stink Arms mostly resembled Four Arms with a few Stinkfly characteristics. Four Arms' eyes were replaced by Stinkfly's eye stalks. He also had Stinkfly's tail and wings. Stink Arms wore a shirt based on Stinkfly's suit and Four Arms's pants. Stink Arms wears the Omnitrix symbol on his face.
Powers and Abilities
Four Arms' high strength was weakened by Stinkfly's lesser strength. Stink Arms had Stinkfly's sharp tail.
Stink Arms' huge mass made it hard to fly. He is also much weaker than Four Arms.
- Dr. Animo and the Mutant Ray (first appearance)
- Stink Arms can be created in one of Bandai's Ben 10 Games along with other fusions. He is the only canon fusion to appear in this game.
- Stink Arms is the first fusion alien in the Ben 10 series.