In the novel Twilight's Sparkly Sleepover Surprise, Sour Sweet appears alongside Sugarcoat and Sunny Flare to taunt Twilight and sabotage her friendship with Sunset Shimmer and her friends. In the half-hour special Mirror Magic, Sour Sweet briefly appears performing in the Dance Magic music video as it is being played at the Canterlot Mall. She appears to act as the de facto leader of the group in this special. They later decide to join forces with the Rainbooms to film the Dance Magic music video in which she wears a disco outfit. In the half-hour special Dance Magic, Sour Sweet appears with Lemon Zest, Sunny Flare, and Sugarcoat competing with the Rainbooms in a music video contest.

She and Upper Crust are later shown speaking with Dean Cadance before leaving with the rest of Crystal Prep's students. As Midnight slowly destroys the world around her, Sour Sweet and her teammates help save their fellow students and the Wondercolts, pulling up one of Crystal Prep's students with Pinkie Pie's assistance.ДЄfter Twilight returns to normal, Sour Sweet remorsefully admits the Shadowbolts' responsibility for what happened, accepting some of the blame before bitterly pinning most of it on Cinch. After Twilight finally hits a bull's-eye, Sour Sweet becomes visibly disturbed when Twilight's dog Spike demonstrates the ability to speak and congratulates her.Дuring the final event, Sour Sweet joins Principal Cinch and the other Shadowbolts in pressuring Twilight into releasing the magic she collected throughout the Games, and she watches in horror as the magic transforms Twilight into the monstrous Midnight Sparkle. She is infuriated when Twilight struggles to keep up and wastes their team's early lead, and she gives her a backhanded compliment for taking their opponent Applejack's advice. Principal Cinch assigns her and Twilight to the archery portion of the Tri-Cross Relay, where she swiftly and expertly hits a bull's-eye.

Sour Sweet participates in the Academic Decathlon of the Friendship Games, being paired up with Sunny Flare during the woodcutting portion, and failing the spelling bee portion. She complains when Twilight Sparkle accidentally cuts in front of her on the bus to Canterlot High School, and she continues to act hostile towards her after Twilight offers to let her go ahead. Sour Sweet appears in My Little Pony Equestria Girls: Friendship Games as a member of Crystal Prep Academy's sports team, the Shadowbolts. 2.3 Friendship Games descriptionДepiction in Equestria Girls Equestria Girls: Friendship Games.

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