The title is a parodic reference to the instrumental tune "Yakety Sax" widely known by its regular use on The Benny Hill Show.
This is technically the eighteenth episode of the eighth season, but aired early as the fourteenth on July 20, 2018 as part of Discovery Family's "Summer Surprises" programming block.
Friendship Report: Pinkie learned she shouldn't stop doing something she likes just because someone told her to.