Ultimate Stinkfly is an insectoid alien with a much more humanoid shape and only one set of legs with pincer toes. The arms are the same as his legs but bulkier, while the body was light blue with a darker greenish-blue as a secondary color. His bulging mucus eyes are yellow, which matched his dragonfly wings and the mucus showing out from his massive stinger tail see-through spot. A black and white uniform covers his chest and almost all the way down to his tail.
The Ultimatrix symbol is located on his chest.
- Enhanced Biology- Ultimate Stinkfly can move at much faster speeds than was able to, originally.
- Explosive Slime- Ultimate Stinkfly's slime is explosive, and he generates it from his large stinger tail and his very eyes, which he can pop off and throw like grenades.
- Large Stinger- The massive stinger of Ultimate Stinkfly is bigger and is now able to move about. The large stinger is able to inject his explosive slime into who or whatever is unlucky to be stung by this fly.
- Durability Decreases- Due to having a much smaller figure to be more mobile, it has cost him the durability he once had in his pre-evolved state.
- Breakable Wings- His wings, though made to boost his mobility and speed in the air, are easier to damage than his old ones.
- This design was mainly made in tribute to the reboot series Stinkfly with some characteristics from dragonflies.