The grand stands are giant candy boxes with specific candy citizens in them cheering for the racers. Here is the list:
Taffyta Muttonfudge - Heart Lollipops
Candlehead - Salt Water Taffy
Rancis Fluggerbutter - Peanut Butter Cups
Snowanna Rainbeau - Gumballs
Minty Zaki - Gumdrops
Jubileena Bing-Bing - Cherry-Dipped Chocolate Kisses
Swizzle "The Swizz" Malarkey - Hard Candy
Crumbelina DiCaramello - Animal Crackers (Teddy Bears and Cats)
Adorabeezle Winterpop - Peppermints
Gloyd Orangeboar - Candy Corn
The Marshmallows are the workers & cameramen who clean the starting line, helping the racers prepare and record each racer from a back view. In this way, they function similarly to the Lakitus from the Mario Kart series.
The Oreos are designated as the royal guards of Sugar Rush. Their duties include protecting the castle and King Candy, and later Vanellope, from any harm. In the film, they are seen chanting the song March of the Oreos.
The Donut Police Squad
Wynnchel and Duncan are two bumbling donut policemen who are tasked with keeping order within Sugar Rush. Despite their incompetence, King Candy apparently holds the duo in high esteem and has them do the brunt of his dirty work.
Other law enforcers in Sugar Rush include the CLAW officers, which are a parody of the SWAT unit. They are anthropomorphic bear claw pastries clad in heavy chocolate uniforms, and they drive an armored truck that resembles a large donut box.
The Devil Dogs are small Devil's Food Cake pastries who act as police dogs for the department.
Beard Papa is the security guard of the Kart Bakery. He is a cameo character originating from the popular Japanese pastry chain, Beard Papa's.
Sour Bill is a small sour candy with an equally sour disposition. He acts as King Candy's loyal servant and advisor.
The racers are the main citizens of Sugar Rush and are all based on humans. Every night after the arcade is closed, they compete in the Random Roster Race to see which racers would get to represent Sugar Rush as the 9 avatars for the next day of racing.
King Candy (formerly; deceased)
Torvald Batterbutter - a yellow/orange/brown Minty
Nougetsia Brumblestain - a pink/white Adorabeezle
Citrusella Flugpucker - a dark blue/purple Jubileena
Sticky Wipplesnit - a turquoise/salmon Minty