Bonding, friendship, BFF’s That is what Twilight want [b]everypony[/b] to do and be, and with her new-won authorities as the Princess of Friendship, she can finally make it happen. This time around , Twilight decided it was Celestia and Applejack
After going through the Pie family records, it turns out that Pinkie is Applejack's fourth cousin twice removed by a fifth cousin. This marks the start of a new relationship between the two families.