"Wow those are some adventures." Shining Armor said as Sonic finished telling the group about everything that's happened until that moment.
"With the girls at my side, it was nothing." Sonic (no longer wearing his crown and cape) responded before letting out a yawn, "Wow, I didn't realize I was talking throughout most of the night."
"We've stayed up longer, remember?" Rainbow Dash asked.
"Either way we should head to our rooms and turn in for the night." Twilight suggested.
"I second that, I do need my beauty rest after all." Rarity agreed.
With that, everyone begins to head out of the throne room but Luna suddenly stops, which Sonic notices.
"What's wrong Aunt Luna?" He asked.
"I'm sensing something," Luna responded, "Something that's making me feel nervous."
Everyone remains silent for a moment, before Luna jumps in front of Sonic and creates a barrier. Shortly after, a beam of magic bursts through one of the windows and strikes the barrier before dying down.
"What the heck was that!?" Sonic exclaimed as Luna took down her barrier.
Just then everyone hear an eerie laugh come from outside.
"That laugh," Sonic said, "but it can't be."
Just then, purple mist comes through the the broken window and begins to take shape into somepony that shocked everyone.
"Nightmare Moon!?!" Sonic and the mane six exclaimed.
"That is right, and I am here for my revenge!" Nightmare Moon exclaimed.
"But how is that possible!?" Twilight asked, "We used the Elements of Harmony on you and destroyed you while freeing Princess luna!"
"Foolish ponies!" Nightmare Moon exclaimed, "You didn't destroy me! You simply separated me and Luna."
"If that's true, how come we haven't seen you for more than a year now?" Sonic asked.
"When me and Luna were separated, my magic was scattered throughout equestria," Nightmare Moon explained, "I had to slowly put myself back together until I regained enough of my magic to take my normal appearance again. But I'm still not complete, but I am strong enough to take my revenge on you!"
"Not unless we help!" Shining Armor said as he stepped forward, only to be stopped by Sonic.
"No, I'll take care of her," Sonic insisted, "Plus she's weakened, it shouldn't take too much to take her down."
"You will regret facing me alone hedgehog." Nightmare Moon said as she fired another beam at him.
Sonic quickly uses chaos control to dodge the attack and attempts to spindash Nightmare Moon in the back.
"Not this time!" Nightmare Moon exclaimed as she bucked behind herself and struck Sonic in the chest.
"Looks like you predicted my attack." Sonic said.
"You did that the last time we battled, I was smart enough to look back and remember all your attacks." Nightmare Moon stated.
"You might memorize all my attacks but that would stop me from trying." Sonic said as he began to use chaos control and teleport around Nightmare Moon, shooting chaos spears at her while doing so.
After getting hit a couple of times Nightmare Moon watched how often Sonic teleported before firing a magic beam with hit him as he reappeared.
"I will admit that did sting a little, but it definitely won't slow me down." Sonic said as he charged at Nightmare Moon and did a homing attack on her face.
"Meddlesome hedgehog!" Nightmare Moon growled after recovering.
"I think it's time I finished this." Sonic said before summoning the chaos emeralds around himself.
As they began to circle him, Nightmare Moon began to panic.
'I can't let him become stronger!' She thought to herself before quickly firing a beam at Sonic, which struck him.
After Sonic landed onto the ground, purple sparks begin to appear around him as he begins to groan.
"That was a dirty move Nightmare Moon!" Princess Celestia exclaimed.
"Well I do like to play dirty." Nightmare Moon responded before she and the others heard Sonic scream.
When they looked in Sonic's direction, said hedgehog began to grow in size. His body fur began to darken until it was navy-blue (except for his mid-chest area, the tips of his quills, the area under his gloves, and his muzzle which became white), his arms became bigger and muscular until his gloves ripped off, revealing white clawed hands. They also noticed his teeth became sharper, even his shoes changed. They obviously became larger, they gained a metal strap with three spikes on it, and the bottom became spiked as well.
"I think I've spent enough time here, but remember this, once I've regained all my magic, I will continue to my quest to put equestria in an eternal night!" Nightmare Moon exclaimed before letting out a wicked laugh.
"You've really... gone and done it this time Nightmare Moon!" Sonic said in a much deeper voice.
"I will admit that's a good look for you, festive." Nightmare Moon said before turning towards Luna, "So long, friend!"
With that, Nightmare Moon envelopes her magic around Sonic quickly flies off with him in tow.
"Sonic!" Everyone exclaims.
As they were flying off, attempts to break free from Nightmare Moon's grip.
"Let me go!" He demanded.
"As you wish." Nightmare Moon said before letting out a laugh and turning into purple mist and flying off.
Remaining in the air for a moment, Sonic realizes what Nightmare Moon and frowns.
"Aw crud!" He said before suddenly falling.
"NOOOOOOOOOOOOO!" Sonic yelled as he fell until he landed onto his face.
After landing, Sonic's legs stay in the air for a bit before suddenly falling to the ground. He then puts his hands at the sides of his head and pushes into the ground, trying to free his face.
After popping his face out of the ground and staggering for doing so, Sonic said to himself, "That's not what I meant."
"Sonic!" Someone called out.
When Sonic turned, he saw that everyone was running towards him.
"Sonic are you alright?!" Princess Celestia asked.
"Yes mom, I'm fine." Sonic answered.
"Are you sure? That was quite the fall you had."
"Mom, if I wasn't fine, is probably would be having trouble standing up right now."
"Right."
"Wow Sonic you're a lot taller now!" Pinkie exclaimed.
Everyone saw that Pinkie was right, Sonic was about Princess Celestia's height now.
"Huh, so I am." Sonic said, "But right now we should remain focused on Nightmare Moon's return."
"Yeah only think of trouble, with her on the loose." Shining Armor said.
"But what about your honeymoon?" Twilight asked.
"Thay going to have to wait until later Twilight." Cadence replied, "Right now, we need to do everything we can to stop Nightmare Moon."
"Let's worry about warning equestria about this first." Princess Celestia said, "We need to have everypony prepared."
With that Princess Luna begins to lower the moon while Princess Celestia raises the sun.
As soon as the sun came other the horizon, purple mist appears around Sonic before he suddenly returns into his normal self.
"Wow! How did you do that Sonic?" Pinkie asked
"No clue," Sonic responded, "but let's focus on putting mom's plan into action."
Nodding at that, everyone begins to make their way back to the castle, now wary about Nightmare Moon's return.