Dimitri is a French Marine Iguana who was a promising young art student in France before his corruption. He developed his own style, dubbed "kinetic aesthetic", which was merely him swinging back and forth from a rope tied around his waist and painting the canvas when he swung by. It was rejected outright and Dimitri was cast out of the art community (Sly mentioned that the art world "wasn't quite ready for" that technique). Infuriated, he began forging old masterpieces as a way of punishing those with bad taste. Joining the Klaww Gang as the Forger, Dimitri set up a nightclub in Paris, drawing in patrons from all around the city. Funneling illegal spice sent from Rajan into the population by covering food with it, Dimitri contributed greatly to Arpeggio's plans. In addition, Dimitri modified the Clockwerk Tail Feathers for use as printing plates. Using their unique alloy, Dimitri could create an endless supply of counterfeit money. After several missions, Sly confronted Dimitri in his lair. Sly was quickly befuddled by Dimitri's strange English, which he had learned from watching hip-hop music videos. Sly responds, "I have no idea what you're saying. And your suit sucks!" Insulted, Dimitri attacks. Dodging blasts of energy from Dimitri's ring, Sly beat the lounge lizard, retrieved the Clockwork tail feathers and ruined Dimitri's operation. Dimitri was shortly thereafter arrested by Carmelita Fox and Constable Neyla. The end credits for Sly 2 show Dimitri is a dance instructor on a cruise ship.
A year later, in Sly 3: Honor Among Thieves, Sly runs into Dimitri in Venice during his efforts against Octavio. Seeking the missing Murray, Sly found Dimitri instead, locked up in a Venice prison. Cutting a deal, the two arranged for Dimitri to escape. In return, the former forger alerted Murray to the presence of his friends in Venice, thus facilitating the Cooper Gang's reassembly. It was retconned so that way he never became a dance instructor after Sly 2: Band of Thieves. Running into Dimitri in Holland, where he was working as an announcer, Sly requested that he help the Cooper Gang locate the lineup for the ACES dogfight tournament, giving Team Cooper a heads up on who they would be flying against so they could enact sabotage. After being pressured, Dimitri agreed, but only if the gang agreed to owe him a favor. Calling in that favor later, Dimitri summoned the Cooper Gang to Blood Bath Bay. In this pirate location, Dimitri's grandfather, Reme Lousteau, had created diving gear and stolen loot from sunken ships. However, the gear was stolen, and Reme started a family. Dimitri grew up on the stories, and vowed to reclaim the treasure. After he helps the gang beat Captain LeFwee, he joins the gang as their frog-man...despite not being asked to do so. After the gang split up, Dimitri became a professional skin diver with girls and money. The last Bentley heard from him was a postcard: "I'm here, wish you were fine-like me." To this, Bentley commends him by saying, "He's his own man."
Dimitri returns in Sly Cooper: Thieves in Time. Before Sly and his friends head off in time, Bentley asks Dimitri to watch over the safehouse and to update with any changes in the Thievius Raccoonus via a crystal-powered radio. He never came to the past with the gang. In the end of the game, Dimitri returns to his skin diving career and eventually gets his own television show called "Disco Diver" where he chronicles his adventures. In the E3 trailer, it is shown that Dimitri has his own cane for a weapon.
He is voiced by David Scully.