Wynnchel and Duncan are characters from the video game Sugar Rush Speedway, where they serve as the primary security forces for the kingdom's ruler. Wynnchel seems to be the leader of the duo, as he orders Duncan around repeatedly. They take their positions very seriously and prove to be rather persistent. As shown in the spin-off comic, The Donut Kart, they seem to have very little patience, considerably Wynnchel, and are sometimes prone to bickering with one another. Despite King Candy's trust in them, however, they are rather pathetic at their job, and often fail their tasks due to their incompetence and weak-will. They are also quite cowardly and pretentious; when Wreck-It Ralph first appeared on the racetrack covered in taffy, Wynnchel and Duncan cowered in fear, until Ralph inadvertently trapped himself in a giant cupcake. Wynnchel and Duncan then proceeded to pompously attack him.
They are quick to violence, immediately bashing Ralph in the head with their batons even after the bad-guy was trapped within a giant cupcake, making it incredibly difficult to move.
Despite their negative traits, they are loyal and respectful toward their sovereign. When interacting with both King Candy and Vanellope directly, they removed their headwear, a universal sign of respect. When Wynnchel asked Vanellope a question near the end of the film, he began with, "Pardon me for asking...", showing he can be courteous despite his short temper.
- Wynnchel and Duncan are King Candy's muscle, ensuring order in the Sugar Rush community. Just don't make 'em mad or their frosting might melt.
When Vanellope von Schweetz, a young girl who was banned from racing in Sugar Rush because she's a glitch, weasels her way into the Random Roster Race, Wynnchel and Duncan are called fourth to arrest her, but a taffy monster interferes and scares the donuts away. The distraction allows Vanellope to escape, while the taffy monster gets itself stuck in a giant cupcake, allowing Wynnchel and Duncan to capture it and take it to King Candy. There, the monster is revealed to be Wreck-It Ralph, who was looking for his medal that Vanellope stole.
King Candy tells him that it's impossible to retrieve his medal because she deposited it in the codes along with the other gold coins, which now allows her to race. Wynnchel and Duncan are then ordered to escort Ralph out of Sugar Rush, but Ralph escapes and searches for racers to win back his medal. Later on, Wynnchel, Duncan, and King Candy head to the kart factory where Vanellope and Ralph have broken in to make a kart. On their motorcycles, Wynnchel and Duncan chase Ralph and Vanellope down but they lose them.
King Candy orders the duo to continue searching, but after a while, Wynnchel and Duncan return to the castle to inform the king that they've failed and King Candy ordered them to leave.
Later on, Duncan can be spotted escaping Sugar Rush during the Cy-Bug invasion caused by Ralph accidentally bringing a Cy-Bug from Hero's Duty into Sugar Rush. Thanks to Ralph, the Cy-Bugs were defeated, as was King Candy, who turned out to be a rogue video game character who dominated Sugar Rush, dethroning Vanellope who is the game's true ruler. Fortunately, Vanellope is revealed to be the "Princess of Sugar Rush", but decides to make herself president instead. After the truth was revealed, Wynnchel and Duncan apologized to Vanellope and gladly became her security guards.
Wynnchel and Duncan then have a final appearance during the end-credits sequence; apparently participating in game-jumping adventures like the lead characters, the duo is glimpsed running from Cyril the Zombie (with a few more zombies) chasing them.
- The names "Wynnchel" and "Duncan" are both puns for the Winchell's and Dunkin' chains of donut shops.
- Additionally, Wynchel is an éclair, which is more common in the western US, while Duncan is a "sugar ring", which is more popular in the eastern US.
- Wynnchel and Duncan are also a joke on the connection of policemen's affinity with donuts.
- There are a few, very brief, scenes in the film where the duo's eyes are visible.
- Their badges read "To heat and serve", a play-on of "To protect and serve".