Roller derby ponies

Several roller derby ponies appear in Call of the Cutie and the IDW comics. Three Earth pony fillies named Bolt, Hairpin Turn, and Finish Line appear in Call of the Cutie, and two pony roller derby teams appear in. The first three are unnamed in the show but are named in merchandise.

Development and designs
Bolt shares her cutie mark with Charged Up. Hairpin Turn shares her cutie mark with Wild Fire.

Princess Skullestia's name is similar to that of Princess Celestia. Snowpain bears a resemblance to Elsa of Frozen, making her the second of such based ponies after Issue 23 Unnamed Mare - Anna. Scarswirl's name is partially similar to that of Star Swirl the Bearded. Shining Harmer's name is similar to that of Shining Armor, and her color scheme is similar to that of Princess Cadance.

Depiction in the series
In the season one episode Call of the Cutie, Bolt, Hairpin Turn, and Finish Line appear on an "ultra pony roller derby" team against Apple Bloom. Their respective team numbers are 25, 19, and 1, and their respective team positions consist of pivot, blocker, and jammer.

When Apple Bloom trips and falls over on the roller derby track, Bolt, Hairpin Turn, and Finish Line crash into her and fall over in a dizzy pile.

IDW comics
Bolt, Hairpin Turn, and Finish Line appear on page 32 of the Call of the Cutie/The Cutie Mark Chronicles comic adaptation My Little Pony: When Cutie Calls.

In, two pony roller derby teams compete: the Manehattan Manglers and the Fillydelphia Phracturers. Members of the Manehattan Manglers include jammer Shadowsmacks, blocker/pivot Princess Skullestia, and blocker Snowpain, and members of the Fillydelphia Phracturers include Scarswirl and Shining Harmer.

Merchandise
In Enterplay's collectible card game, Finish Line is named on premiere card α #9 U, which lists the quote "Out there on the roller derby track, you call me 'Whiplash.'" In the Canterlot Nights expansion set, Hairpin Turn is named on card #14 C, which gives her the description "Hairpin Turn is quite a nice filly if you meet her on the street, but her roller derby persona 'Burnout' is another matter entirely..." In the Crystal Games expansion set, Bolt is named on card #5 U, which lists the quote "Roller Derby is a high-energy sport. A pivot like me has to always be ready to switch from blocking to jamming at a moment's notice!"

Quotes
"So, Babs, did you enjoy the show?"

- Shadowsmacks,

"You know, I dig that. My mom used to be the same way. But I think she got into it after a while. You gotta let fillies find themselves and support them, ya know?"

- Shadowsmacks,

"By the way, I like your mane, Babs. Mine looks similar when I'm not skating. Check out what I do when I skate. Pretty cool, right?"

- Shadowsmacks,

"Out there on the roller derby track, you call me 'Whiplash.'"

- Finish Line, Enterplay collectible card game card α #9 U of Finish Line

"Roller Derby is a high-energy sport. A pivot like me has to always be ready to switch from blocking to jamming at a moment's notice!"

- Bolt, Enterplay collectible card game The Crystal Games card #5 U of Bolt