The Ultimate Alliance - The Ultimate Series Episode 22

Since the Defenders destroyed the Ring, Middle-Earth is save for now. But there's another problem. They've been gone for so long that Sean's archnemesis, Nega-Sean is planning to wage war on Equestria. He has already kidnapped the alicorn princesses. Now that Sean (me of course) is back, it's up to the Defenders to stop Nega-Sean and his allies and save Equestria from destruction.