Yakity-Sax

Yakity-Sax is the eighteenth episode of season eight of My Little Pony Friendship is Magic and the one hundred and eighty-seventh overall.

Zap2it
"Pinkie Pie has a new hobby that she absolutely loves - playing the Zenithrash. But when her friends discourage her from playing due to her lack of skill, it causes a series of events leading to Pinkie Pie possibly leaving Ponyville forever!"