It's another beautiful day in Equestria as Twilight and her little brother, Phantom, as well as their friends are heading to the Crystal Empire for their first royal summit. They are now exiting the train and walking to the castle. Outside the castle, they are all talking about the royal summit.
"Hoo-wee! Y'alls very first royal summit. Phantom, Twilight, y'all must be over the moon." Applejack told them.
"Oh, we are excited, Applejack." Twilight started.
"But, to be honest, we're a little nervous, too." Phantom added.
Then Pinkie Pie got in both of their faces. "You guys are 'nervicited'! It's like you wanna jump up and down and yell "YAY ME!"" Pinkie Pie shouted while jumping up and down then she curled up in a ball. "But you also wanna curl up in a teeny-tiny ball and hide at the same time! We've all been there!" Pinkie said as she left the ball and ruffled both of their manes.
"I'm there almost every day." Fluttershy said.
"Y'all got no reason to fret, Phantom and Twi. Everything's gonna be just-" Applejack started then Rarity interrupted her. "TWILIGHT AND PHANTOM! Oh, sorry, darlings, but I just realized that the both of you are not wearing your crown. You haven't forgotten it back in Ponyville, have you?" Rarity asked the both of them.
"Rarity, it's in our bag." Phantom said and Spike patted their bag that he was dragging.
"The main reason that we aren't wearing it is because we are just a little self-conscious about wearing it." Twilight said.
"Also, we aren't really used to our wings either." Phantom added. The both of them then tried flying but both of them fell to the ground.
"Twilight and Phantom, the both of you are now a prince and princess. You should embrace it! I'm telling you, if I had a crown like that, I would never take it off. Why, I'd sleep in the thing." Rarity said and both Twilight and Phantom rolled their eyes.
'Of course Rarity would sleep in her crown.' Phantom thought to himself.
Inside the Crystal Empire Castle
There is a horn fanfare to announce both Prince Phantom and Princess Twilight. They both looked around at the fancy decoration and royal guards. Twilight was so busy looking around she didn't hear Phantom warning her. "Twilight, watch out." But it was too late. She bumped into an orange Pegasus wearing armor, signifying that he was in the royal guard.
"Their highnesses, Prince Phantom and Princess Twilight Sparkle!" He shouted while pointing at them. Then Princess Candance walked up and laughed a bit.
"Phantom! Twilight! I haven't seen either of you since the coronation!" Princess Candance said as they all gathered in for a group hug.
"We have so much to discuss. But it can wait until tomorrow. You all look tired from your journey. Now, off to bed, all of you." Princess Celestia said as she walked up to the group with his sister, Princess Luna. Phantom smiled as he saw his teacher. Then they all left for bed talking about the summit tomorrow. They were all very excited.
In Phantom's and Twilight's room
Due to Phantom and Twilight being brother and sister, they decided to share a room together. They were unpacking their things then they both looked in the mirror of their room and by using their magic, they put their crown on top of their heads. Looking in the mirror with their crowns on their head, they both sighed heavily. "What's wrong, Twilight and Phantom?" Spike asked concerned.
"I don't know, Spike. We're just worried, I guess." Twilight started.
"Princess Candance was given the Crystal Empire to rule over. What if, now that the two of us are a prince and princess, Celestia and Luna expects us to lead a kingdom of our own?" Phantom said clearly worried and nervous just as much as his sister.
"That would be awesome!" Spike said excitedly while using his tail to make him taller.
"No, it would not!" They said together.
"Just because we have this crown and these wings…" Phantom started.
"It doesn't mean we'll be good leaders." Twilight finished as the two of them put their crowns on a nearby lampstand and sat on the bed.
"Phantom, Twilight, I know that you will. Now c'mon, you guys should get some shut-eye. Big day tomorrow!" Spike said as he covered them both in the blanket on the bed.
Then Spike went to his bed to get some sleep as well. Then he woke up and turned around and saw Phantom and Twilight struggling to get comfortable with their wings popping up every few seconds. Phantom grunted and his eyes turned green with frustration. "Can't…tuck…!"
"Just trying to get comfortable!" Finally, they got their wings down, Phantom eyes turned blue again, and they both went back to sleep then both their wings popped out again. They both groan in frustration as Phantom eyes turned green for a second then turned back to blue.
Later that night
The royal guard are inspecting every hall in the castle watching for intruders. Suddenly there is flash of light coming from a room. When it opens, it reveals two hooded figures looking around for any guards. They ran through the hall looking in each room for their intended target. After several minutes of searching they found what they were looking for, Prince Phantom and Princess Twilight's crowns. They carefully walked into the room making sure to make no noise. Using their unicorn magic they picked up the crowns and placed them in their bags and pulled out another crown that looks exactly that the one they stole. Suddenly one of the figures hit the desk knocking off the lamp luckily the other used her magic to catch it. They both looked at the sleeping ponies and dragon to make sure they didn't wake up. When they didn't, they placed the lamp back on the desk and proceeded to leave the room with the stolen crowns.
Then one of the figures tripped over Spike's tail, waking both him, Phantom and Twilight. "Huh? What?" Spike said in surprise.
Twilight and Phantom rubbed their heads and Phantom's eyes turned green in anger at the sight that he saw. They two ponies had stolen their crowns. "Our crowns! They've got our crowns!" Twilight shouted.
The two thieves ran out of the room and Phantom started to chase after them along with Twilight. "Stop! Thief!" Phantom shouted waking everypony else up.
"They've stolen our crowns!" Twilight shouted as she was running by her friends' rooms. They all gasped in surprised and started to chase after them as well.
"STOP!" Phantom and Twilight shouted as they teleported in front of the thieves, then they teleported as well but this caused them to lose the hoods reveal an orange unicorn with aquamarine eyes, with a fiery mane and tail, and a sun of a cutie mark and a white unicorn, with the same color eyes as the orange unicorn, black mane, and tail with a white streak in the middle, and a half moon with a little purple for a cutie mark. The two unicorns ran off and Phantom and Twilight chased into a room with a mirror then they tackle the two thieves causing them to lose the crowns through a mirror.
Everypony gasped. "What did you do with our crowns?" Phantom and Twilight shouted in anger.
"Sorry it had to be this way…" They both said together then they teleported in front of the mirror. "Princess/Prince." They said with the orange unicorn saying princess and the white unicorn saying prince then the two of them left through the mirror.
They all gasped as they both disappeared. "Who was that?" Fluttershy asked out of nowhere.