Stinkbug (Kinnikuman)

The Stinkbug is a gelatinous alien creature from Kinniku Planet first mentioned in Yudetamago's anime Ultimate Muscle. Its body shape is typically three-tiered and brightly colored, with small legs and arms and large eyes. The Stinkbug's body is either made of or covered by a sticky gelatinous material that gives off a fetid odor when disturbed. This odor is very difficult to remove from clothing or other materials it comes into contact with. The Stinkbug has some form of intelligence as it can speak with its large mouth various words. The level of intelligence, however, is not indicated.

Kid Muscle used a Stinkbug hidden in his pants to defeat Pumpinator.

References:Ultimate Muscle episode 9