The Cutie Mark Crusaders (CMC) is a club consisting of Apple Bloom, Scootaloo and Sweetie Belle, formed in Call of the Cutie. Their unity is based on being "blank flanks", ponies who have not yet gotten their cutie marks. Each filly represents a different race, with Apple Bloom, Scootaloo and Sweetie Belle being an Earth pony, Pegasus pony, and a unicorn respectively.
The exploits of the Cutie Mark Crusaders are featured in several episodes in the series.
In The LBT-MLP Crossover Movie And TV Series, The CMC Decied To Become Dino Rangers, With Little Success.