Applesauce

Applejerk is a clone of Applejack created by Dr. Nefarious in order to wield one of his Elements of Disharmony. Representing Dishonesty, Applejerk is a liar, and will not hesitate to hide secrets from her enemies. She has no cutie mark because she was freshly born and has not represented anything.

History
Dr. Nefarious gained Applejack's DNA, and used it to create an exact duplicate the same maturity as her. But since Applejerk started out having Applejack's same personality, Nefarious had to use a machine fueled by the power of Discord to reverse it. This makes Applejerk Applejack's mental opposite, being a dirty liar and dishonest jerk. But even if she is afraid to admit the truth, Applejerk doesn't want to be a huge threat, and instead wants to be a lesser threat with only her clone friends, meaning that she still has good inside.