Commissioned by somepony who wanted to see a Bubblegum Crisis (OAV) crossover with FiM. 80s Japanese cyberpunk meeting brightly coloured ponies. Natch.

Years after a great earthquake has reopened an old fissure to Earth, Princess Celestia is drawn back to the scene. Unable to help herself, she plucks four weary vigilantes from a fight and brings them back to her own world. But Mega-Tokyo can't be left undefended against the constant threat of GENOM and its Boomer technology, Luckily, Luna knows a thing or two about defending a city.

Picture drawn by http://www.endlessnostalgia.deviantart.com