|Real name:||Barney L. Fatheringhouse|
|Criminal Data File:|
|Background:||Dimwit & Strongman|
|CROOKS Position:||The nephew of the Big Boss|
|Significant Episode Appearances:|| The Case of Berserko's Big Surprise|
The Case of the Brilliant Berserko
The Case of the Sinister Spa
The Case of the Pardner in Crime
The Case of the Rock and Roll Robbers
The Case of the Lowest Crime
|Voiced by:||Paul De La Rosa|
Berserko was asked by his uncle Big Boss' servant Squeeky Kleen to prepare for Big Boss' surprise party. Berserko wanted to surprise his uncle with The Cornucopia Bridge, but the surprise was cut short by Mirage.
Berserko and Turbo Tu-Tone steal the chess crown from the science museum and Berserko used it to make him smarter or in this case, Brilliant. Using his new found brilliance, Berserko kidnaps Hardtop and lures LongArm & Bulletproof into finding him. Meanwhile, Dr. Badvibes notice something is up and steals the chess crown for himself; putting Berserko back to his former dum-dum self. But LongArm & Bulletproof busts Badvibes before he could getaway. Bulletproof frees Hardtop afterwards.
Berserko made a hypnotized Mayor Davis make him deputy mayor. Berserko did some political & mayoral things like kissing babies and order statues of himself. But according to his uncle Big Boss, his real job was to ruin the C.O.P.S. by making them street sweepers, allowing him & Ms. Demeanor and other crooks to steal the city payroll. Eventually, the C.O.P.S. caught up and ruined their plans. Berserko got severely punished by his uncle in the process.
While attempting to rob a gold shipment, Berserko accidentally fell into a black box full of Crystal Twist; a drug which was lately sold on the streets by a nasty drug dealer named Addictem. Berserko got hospitalized because of it. Big Boss was so sad for his nephew and upset by the fact that drugs are messing up his town, that he had no choice but to team up with the C.O.P.S. along with his crooks. Together they took down Addictem and ended his drug business for good. Berserko, who apparently was feeling better, even helped out by sneaking up on him from behind and grabbing him.