Batman: Guardian of Gotham Wiki
Arnold Flass
Real Name Arnold John Flass
Age 50
Occupation Detective, Head of Major Crimes Unit
Base Gotham City
Height 5ft 10in
Weight 250 lbs
Eyes Blue
Hair Brown
Relatives Unknown
Affiliations Gotham City Police Department, Gotham Mafia
Alias None
Species Human
Powers and abilities None
Voiced by Bo Dietl

"Well, Jimbo, you don't take the taste. . . makes us guys nervous."

-Arnold Flass

Arnold John Flass is a corrupt police officer in Gotham City and Lew Moxon's and later Black Mask's right hand man. He is voiced by Bo Dietl.


Arnold Flass started out as a Green Beret. After his dicharge he moved to Gotham and became a police officer and worked his way to detective. Eventually, he was put in charge of Gotham's Major Crimes Unit, a position that he got because of Lew Moxon. His unit was full of corrupt cops that worked for Lew Moxon and later Black Mask. When the new police commissioner, James Gordon, gathered evidence against Moxon, Flass went into the evidence locker and destroyed all the evidence. Flass was Moxon's and Black Mask's right hand man and he and the other members of the MCU would serve as henchmen to the super criminals employed by the two crime lords. Eventually, Batman was able to find evidence against Flass and Gordon arrested him on charges of conspiracy.  


  • In the comics Flass is skinny and clean cut. The look of the character in Batman: Guardian of Gotham will be based on Harvey Bullock who was an over weight, scruffy, cigar smoking, detective.  

Episode appearances[]

Season one

Season two

(Mentioned only)