"It was horrifying Doctor Whooves! I've never EVER seen that happen to Twilight before!" Spike told him after they were both safely outside of Twilight's hospital room."She fell on the floor while reading and just changed!" Spike was pacing back and forth across the hallway, so nervous and shaken up that the Doctor had to help him first.

"OK Spike calm down. Spike? Spike. Spike! SPIKE!!!!" The Doctor yelled. Spike froze and looked at him."What exactly DID happen to Twilight? She looks perfectly normal to me right now." The Doctor said.

"That's because she stopped being Her!" Spike told him with a shudder.

"Her? Who was Twilight other than herself?" The Doctor asked Spike. He was getting more and more confused as the conversation continued. I mean it was pretty far fetched that anypony could possibly be anyone other than themselves. Well unless it was a rare sort of sickness. But what were the chances of that?

"She was different Doctor! She called herself Night something . . . oh she called herself Nightfall Doctor! She sounded differently and wore armor and her wings were long and a dark purple."Spike told the Doctor.

"Her voice sounded funny and she looked different? Oh come on Spike I do not see any physical or mental differences at all!" The Doctor said to Spike. "Remember that I'm a Doctor and not a magician. Twilight looks and seems fine right now! I think you have been working too hard lately Spike. Do you feel like you are sick in anyway?" The Doctor asked Spike. Spike wasn't listening to him anymore. He just pointed at the crack under the door.

"Look Doctor! I told you! Twilight turns into something whenever she gets really frustrated or mad!" Spike said as he pointed at the door. Through the opening under the door, something that looked suspiciously like black smoke was leaking through.He then ran towards a towel rack and took refuge there.

Slowly, the Doctor opened the door to Twilight's room only to find himself face-to-face with a extremely scary scene before his eyes.

In the room stood a tall, thin alicorn with very dark purple fur in front of him. The mare appeared to have a dark purple and starry black mane and tail that moved in long, smooth waves like it had its own personal wind. Her horn was a curved, pure black talon shaped horn.What was more, was that the mare's wings unfurled themselves and the Doctor saw the dark purple and black feathers quiver. And the mare's cutie mark. . . the mare's cutie mark was just like Twilight's.

Even scarier was what she was wearing. Silver and black studded armor was laid out in intricate patterns all over her chest and back area. She wore dark, crown-like armor on the head that was, again, laid out in specific and intricate patterns just like the armor on her chest and back were. It also appeared to be made of the same kind of that blackish-silver metal that made up her chest. On her hooves, there were what appeared to be metal shoes that, also, had intricate patterns and shapes along them. As she turned to face the Doctor, he noticed that her eyes were a piercing bright purple with cat-like slits.

The Doctor stared at the strange mare with wide open eyes, not believing what he was seeing. He just couldn't believe what had happened to the once kind Twilight. Then the alicorn turned her attention to the Doctor.

"I am Nightfall! Newly born Princess of Darkness! Bow down before me subjects, or face my wrath!" Nightfall boomed to the frozen Doctor. Her voice was deep and resonated through the small room. The Doctor just stared at the mare."I said BOW!" She boomed again before forcing the Doctor to bow. But that small amount of magic was all that was needed to make the transformation go back."Ahh!" Nightfall screamed as she began to become normal once again. The mare's mane and tail went from the smokey, purple black starry mane to a strait, lighter purple with a few streaks. The mare began to shrink until she was about the size of the Doctor and her horn went from the curved, pure black horn to a smaller light purplish lavender. Nightmare, as she called herself, was turning into Twilight. Her wings grew smaller in size and grew lighter in color until they were normal again. The alicorn Twilight opened her eyes just slightly enough to see that the once bright purple cat-like eyes were replaced by a deeper color. Even though he was afraid, the Doctor gently picked up the sleeping unicorn and laid her on the hospital bed before going to speak with Spike.

"I told you!" Spike told the Doctor for the twentieth time."Doctor do you know what she has?" He asked worriedly.

"Yes I believe I do know," the Doctor began."I believe she has a very rare case of multi-personality-disorder Spike. It is very rare because only alicorns can get it. Along with that fact, it only comes out to infect one once every 1000 years. If ANYONE found out what Twilight has, they will be terrified of her! Do not tell anyone what Twilight has, because they may not understand and become so scared of her that she would be forced to take refuge in many places." The Doctor informed Spike.

"OK Doctor can we come back soon to check on her?" Spike asked.

"Yes come back in a week. When Twilight wakes up we must tell her. If she did not know what was happening to her it would scare her as well." The Doctor informed Spike. Spike nodded and went into Twilight's room and sat down, getting ready to tell her the bad news.

Author's Note

Ohhh what happened to Twilight??? (Makes evil vampire face)