Trivia relating to Sly Cooper.
- Sly Cooper bears a striking resemblance to Jojo the Raccoon from Sucker Punch's first title Rocket: Robot on Wheels.
- Sly's signature color is blue. Unlike Bentley and Murray (and most characters), his is not based off his skin or fur, but off of his attire.
- Sly wears an actual mask over the mask-like fur around his eyes.
- Sly is often shown smoking in concept art.
- Concepts shown in a "making of" movie in Sly Cooper and the Thievius Raccoonus show that Sly's early designs ranged from him wearing nothing more than his hat and shoes to even being chubby.
- Sly Cooper won "Best New Character" at the Game Developer's Conference in 2002, and the Best Stealth Character by DragonAx in 2011.
- Sly is of multi-racial descent (English, Scottish, Middle Eastern, Egyptian and Japanese in particular) based on his ancestry.
- Sucker Punch originally planned Sly's name to be JT, not Sly, accompanied with a different voice actor. This can be found in in the "The Evolution of Sly" bonus video in Sly 3: Honor Among Thieves.
- Sly, Bentley and Murray, in contrast to their real life species, can't swim because they never learned how to when they were in the orphanage. In Sly Cooper and the Thievius Raccoonus, you can get a page from the Thievius Raccoonus that lets you recover from falling into water. This does not carry over to the second and third games, but collecting Sir Raleigh's Frog Hat from the safe in Of Mice and Mechs of Sly Cooper: Thieves in Time gives the ability to every playable character.
- Sly uses two signatures throughout the series; in Sly 2: Band of Thieves, when he sends Carmelita some postcards, he uses a capital "S" as his signature, but other times he uses his whole first name.
- Sly's last name "Cooper" can mean "barrel-maker" in the English language. This is possibly a reference to how, in the first two games, Sly is able to hide in barrels to avoid being seen by his enemies.
- During cutscenes in Sly Cooper and the Thievius Raccoonus, Sly appears to have entirely yellow gloves and black shoes. During gameplay, he has blue gloves and shoes.
- In Thieves in Time, there is a Sanzaru logo on Sly's backpack.
- Sly is three years younger than Carmelita.
- In the Thieves in Time episode Turning Japanese, Sly passes himself off as "Major Muggshot," as a reference to the member of the Fiendish Five.
- As the Sly Cooper series has released all over the world, there are many voice actors for Sly Cooper in different languages.
- In Japanese, Sly was voiced by Tomokazu Seki in the first two games. Takeshi Kusao eventually took over as of the 3rd game and in his appearance in the Japanese dub of Playstation All-Stars Battle Royale, as well as re-recording Sly's dialogue in the Japanese version of the Sly Cooper Collection.
- Sly was voiced by Rais David Báscones in Spanish, later replaced by Cholo Moratalla in PlayStation Move Heroes. Sly was voiced by Javier Naldjían in the Latin American dubs of Thieves in Time and Playstation All-Stars Battle Royale.