note : not sure if ponyefie is even a proper word, and yes i spent ages trying to spell it and this is the best spelling i can get (seriously try out some other spellings of it, they are even more messed up)

Dr. who (the human one) has just regenerated again but this time he takes on a different form. the TARDIS has for some reason been drawn to pony-ville. the doctor has difficulties adjusting to his new body and the new dimension (with hopefully comic results)