This episode focuses on the relationship between , her sister Maud Pie , and their friend Starlight Glimmer .
: The team investigates a murder linked to a counterfeit diamond operation. [S7E4] Pink Rocks
While titled " Black Market " in the final release, this episode's early development title was . This episode focuses on the relationship between ,
: With help from Starlight Glimmer, who shares a genuine interest in rocks with Maud, Pinkie learns to respect her sister's boundaries. Maud eventually decides to move into a cavern near Ponyville on her own terms. The Mentalist: "Black Market " (S7E4) : With help from Starlight Glimmer, who shares
: After Maud Pie graduates with her "Rocktorate," Pinkie Pie is determined to convince her to move to Ponyville. However, Pinkie's overly aggressive attempts to make Ponyville "fun" for Maud almost drive her away.