For Frenzy it's not about any "Decepticon cause," it's not about any quantifiable cause, or goal, or purpose at all. It's about violence, fear, destruction, and mayhem. Frenzy lives to fight. He lusts to destroy with an intensity that borders on insanity. War is his fuel, his oxygen. Despite his small stature he'll lead a charge into battle against robots many times his size, screaming for destruction with every microchip of his being. This single-minded obsession makes him a hard bot to associate with personally, but a frightening asset on the battlefield. His partner and brother, Rumble, is only too eager to back him up.
Frenzy's manic attack style and his "battle cry" (a sonic attack produced by special drums in his torso that can severely disrupt electrical flows, resulting in all sorts of mechanical malfunctions and balance issues) make him difficult to get close to in combat, but cool and measured reaction to his wild ragings is usually the most effective strategy.
HIs alt-mode is a Robot/Microcassette.