The Dark Pony of the Night, Mare Do Well is out hunting the musical villain Music Mull who wants to control the whole world with his mind control singing and this number is abut how he feels about Mare Do Well making him and everypony else unwell.
When she has a run in with the Bat, Twilight becomes determined to find him. With the help of billionaire Bruce Mayne, she works to prove that the Bat is just an ordinary pony in a cape and take him to justice.
The Riddler has been transported to equestria, After Being Stabbed by lee and he is trying to find a way back to Gotham while finding the perfect nemesis