>>19278669Scizor and Genesect are the only two that benefit from having Bug as a type. Bug covers up Steel's harsh Fighting and Ground weaknesses, but gives them a x4 weakness to the easily manageable Fire.
Volcarona's Bug STAB is incredibly easy to switch into since everything under the sun resists Bug, so offensively Bug isn't that great of a type on a special attacker. Defensively you get fucked in the ass by sneaky pebbles, gain a Flying weakness, but lose Fire's Ground weakness.
Only retards run Pinsir with Bug STAB, and if Pinsir didn't have ridiculous offense with priority he would be bottom of the barrel since Bug/Flying is one of the worst typings in the game.