Character from Ben 10 by Man of Action / Cartoon Network
A large insectoid alien with four wings, prehensile tail, and the ability to spray caustic goo — Ben's aerial transport form who combines flight capability with serious offensive options and significant odor.
Stinkfly is Ben's flying form during the Original Series era and the alien most likely to receive complaints from bystanders even when he's helping. The smell is real, present at all times, and does not improve with familiarity. Beyond the odor, Stinkfly is legitimately useful: fast in the air, capable of carrying Gwen and Max while flying, and able to spray goo that can pin enemies, corrode materials, or simply ruin someone's day if they're in the way. Ben has a complicated relationship with this form — he thinks Stinkfly looks cool, which is an opinion he doesn't share with Gwen, who has strong feelings about being carried by something that smells that bad at altitude.
A large insectoid alien with a dark blue body, four translucent yellow-green wings, four eyes on stalks, and a long prehensile tail. Glands under the eyes can project streams of caustic or adhesive fluid. He has a distinctive smell — not subtly bad, dramatically bad — that functions as a practical deterrent in itself.