When Rhythm Pulse comes to Ponyville, he meets the mane six, attends a Pinkie Pie party, blah blah blah... he isn't a saviour of the world or anything, so if thats what you want, GTFO.
Wubwubwubwubwubwubwubwubwubwubwubwubwubwubwubwubwu-- SHUT UP!!!