Summary: This is a Jelsa and ROTBTFD Pokemon Mystery Dungeon!AU. This prologue will explain how Elsa meets Jack Frost for the first time, about how their adventure will begin.

A/N: This is a big project for me. This story will surely goes long and I'll try to make the story exciting. I decided to take in Pokemon in this story, since I am too lazy to find the alternative. The story will look as same as the game, but with a little bit mix and major change in some parts. I hope you like it ;)

Distant voices appear.

"Get out there now!"

"Just a little more!" the voice sounds exhausted, "Don't worry about me!"

A rumble of footsteps interrupts their conversation

"Hurry or they'll find us!"

"Done! It is done!"

An explosion erupts

"No! Hold on to me! Wake up, can't you hear me?" the voice sounds agitated

"They are here!" yells someone followed by others that said, "Freeze, don't move!"

The voice sounds panting for a moment. "I can't let them take you. I'm sorry, I have to let you go." The sound started to disappear, followed by the sound of something plunging into the water.

Sun starts shining in the horizon, and Elsa already arrived at an old and odd-looking wooden house near a cliff.

"I've finally arrives, I hope no one is following me." She raises her hood to reveal his fresh platinum-blonde hair, braid just like the coronation day. "I worry if Anna follows me".

Normally, to keep her regal attitude, she would walk gracefully as what would a queen do, and let her bodyguard lead the way. But now she is all alone and not in her queen apparel to hide herself from citizens. She wears her normal attire, similar to Anna's normal attire but Elsa's is colored in blue rather than green. "I wonder how the spies in my kingdom manage to keep them hide from people like this.", as she spoke silently in her mind.

Elsa then looked at the peculiar house. "Okay, now..." Elsa takes a deep breath, "... just walk to the door, and introduce yourself." She hesitantly walks to the door, then stop and let out a groan, "I can't do this!" She sighed and looked at her necklace that was given by her late father, "It's my wish since I was a child. And what's left for me to do is get in there."

Elsa inhales and exhales for a couple of moment, and then "Okay, let's do this."

She then put all of her courage to knock the door. When she finally knocks, a man's voice suddenly heard from the house, "Who would you like to see here?" making Elsa taken aback, "Good grace!" She draws herself away from the door.

She wanted to answer the question and get in, but on the other hand she still scared about whether her decision is right or wrong. Making Elsa doubtful about herself.

"Who would you like to see here?" the man asked again, with the same voice tone. Elsa draws herself back even more further from the house, "I can't do this. Someone will worry about me." She stared at the house for a moment, then frowns to her necklace. "I can't do this, I'm such a coward." She then sighed and walks away from the house.

"If only I could be as stubborn as Anna."

Elsa's train of thought is interrupted by the sound of something screeching, "Dragon..." as Elsa look up to the morning sky to see a black figure flying down towards the cliff below the house, when she sees a figure disappears behind the trees, definitely not a dragon.

"Who's there?" Elsa asked herself in her mind, and take another look at the tree, but nothing happen. "I must be delusional. I need to go somewhere to clear out my mind." She then walks with disappointment look in her face.

Moments later…

"That damn dragon almost caught us!" the figure from behind the tree walks toward the house. "What if she saw us?"

Another person pats the shoulder of the agitated person. "Relax cousin, if she saw us she would yell to us. But then again, we won't come out that easily."

"Yeah easy to say that, J" he buttoned his dress, "The damn shirt always keeps me occupied, I should buy a new shirt."

The person goes by the name J laughs to her cousin, "We can get you a lot more than a shirt once we get that necklace, K"

"You think that is valuable? What if that necklace is a trash that she bought from some market?" K asked J with his british accent.

"Still, it belongs to a queen." J turns his eyes to her cousin, "Who would not die to have something that once belongs to a queen?"

K raised his shoulder "I don't know, someone with no knowledge of jewelry?"

J slightly punched K's belly, "Aw, okay I'll stop!" both of them turn their looks to the direction where Elsa walked. "How can we get the necklace anyway?" K asked his cousin

"I have a plan to do it." J answered his cousin easily.

"A queen with magical power and also bloody dangerous?" K turns his attention to his cousin, "Do you know what we are dealing with here?"

"Don't worry, we will use the thing that boss gave us." J reveals a harmonica. "We'll be unbeatable by this."

"Is that what I think it is?" K tries to grab the harmonica, only to receive a slap from his cousin. "Ouch! I just want to see it."

"Be careful with this. Play it and the whole guild will wake up and attack us out of nowhere." J talks quietly but still persuasive to his cousin.

"Okay fine, but would that thing work?" K seems very doubtful about J's plan

"Remember that this works well, and she's not the only person that has a special power in this world that we can stop using this."

Suddenly they heard something from the house, a sound that unlocks the door.

"Looks like the cavalry just woke up."

"Then we need to hurry." K walks hurriedly down the road, "We need to find the queen before the guild turn us to ashes."

"This will be a piece of cake." J laugh sarcastically as they walks to where Elsa headed, while K only rolled his eyes when he heard J laughs.

Usually, Elsa didn't think where she would go when she has a lot of troubling mind. But then, she usually wind up in an enormous lake on top of the mountain, just like she did right now after yet another failed attempt to get into the guild.

"I always love this lake." She took a look into the sunrise and the sun's reflection in the lake, "My second getaway after the ice castle."

Elsa noticed bubbles started to fill the morning sky, all come from the same direction. When Elsa looked to where the bubbles originated, she saw a bunch of penguins, but not really a penguin. Those penguins colored in light-blue, big eyes, and tiny yellow beak. Elsa remembered those creatures and most of people call them, "Piplups…" as Elsa said in her mind, "How cute they are! I wish I could own them."

Elsa watched them blowing bubbles to the open sky. One of the Piplup seemed in trouble walking towards the flock of other Piplups, it felt down and get up again to join other Piplups, leaving Elsa in giggles and big smile in her face, "Oh how I want to eat you up." Elsa took a look again into the horizon, "I always feel content when coming here. It gives me a moment to relax."

Elsa was scanning the horizon, when she saw someone afar lying on the ground, "Wait, who's that?" She comes closer onto the person, making Elsa panic "Oh dear god!" She runs towards the person and look at him.

He stranded on the ground facing backwards. Beside him lies a G-shaped wooden stick. His face is covered on the ground. He wears a blue jacket with hoodie. the hoodie was attached to his hair until Elsa removed it to reveal a pale yet striking white hair, and also good-looking face as she thought in her mind. She checked the pulse in his body, and she relieved to know that the person still alive, and try to wake him up out of the cold. "Hey wake up, are you okay?" she shakes his body to awake him, and that method proves working.

"…Ugh" the boy lets out groan. He put his hands in his head, like he suffered a great headache. "Where…" then he look to Elsa with a puzzling look in his face, "Who... are you?"

"I was gonna ask you the same thing." Elsa looks very worried and frowned on him. She get on her knees to get onto the same level as him, "Who are you? How did you end up like this?"

He frowned for a bit, and his eyes suddenly open wide, "I don't know… I don't know how. Where is this place?"

Elsa was puzzled by his words, "This is North's lake in the North Mountain. You don't know this place?"

The boy still has his eyes wide open, "No. I don't remember anything." He still look at Elsa in confusing looks.

"You don't know how did you get here?"

"No, I don't know, I can't remember anything." He holds his head really tight.

"Well, that's weird." Her voice turns suspicious, then she tested him, "Do you know me?"

He look at her, still with confusing look. "No ma'am, I don't know you."

"Wha… Ma'am?" she blushed for a second, "I'm not…" she put her head down and sighed. She then asked again, "Well, at least, do you know your own name?"

The boy suddenly looked at her, like he knows something, "Yeah, I know my name. My name is Jack. Jack Frost."

"Jack Frost?" Elsa frowned for a moment. She remembered that name from somewhere, but couldn't recall it. She passed away that thought to tell him her name, "My name is Elsa. Queen Elsa of Arendelle." Usually she would stood up and on her regal position to tell her name, but then the boy whose name goes by Jack Frost here still trying to grasp to the reality. So she just kneel to help him understand the situation, although Elsa herself isn't quite sure what happened to him.

"Oh, so you are a queen," Jack Frost started to sit down, "I'm sorry for troubling you then."

"No, I'm fine. But you, you need to go to the clinic." She stood up and offering hand, "I know a clinic nearby, you can come with me."

Seeing all the trouble he created plus the confusion about why he ended up here, the only reasonable choice is to go with her since he has no other option. But when he took her hand, she suddenly tripped off on him. Leaving them both squeal in pain. "Ouch, watch your step your highness." He then saw two young man that probably caused her fell.

"Sorry your highness, we didn't see you there." As the first young man spoke in his british accent.

Elsa turns her attention to them, "Watch where you going!"

"We merely trying to get you two together, and oh what's this?" the second young man look to other direction where Elsa's necklace fell. "What a nice necklace."

She shocked then checked her chest to reveal that her necklace is fell off, "No that's mine!"

"You really should tie your necklace well, your highness." J holds her necklace in his hand, "I'm gonna borrow this, if you don't mind."

"Give me back my necklace!" she ready her hands and all of the sudden emerges aura from her hands, making Jack stands and get away from her, "You don't want me to show my power to you."

"Well that can be arranged, right K?" J snaps his finger to K, then K starts to play the harmonica. All the sudden the aura disappeared from Elsa's hand, then she felt really dizzy, "Wha… What's happening?" she trembled at her own feet, and fell down. Luckily, Jack is behind her to prevent her falling to the ground.

"I'm sorry your highness, but you don't know what you're dealing with here, let's go K!" They run away before Jack could even say something to them. Jack's attention turns to Elsa that is still trying to get up on her feet.

"Are you okay?" Jack asked her while she hold on to his hand, she then starts to gain conscious, "I'm fine, thank you." She started to rise and looking into the direction where the thieves gone. "They stole my necklace!"

"They must've gone a little bit deeper into the forest." Jack scanned the forest, "The forest looks thick. If they don't have sense of direction, they wouldn't have gone far."

Elsa still shocked, knowing that her valuable necklace is in the possession of some criminals. Be that as it may, she wondered much about how the voices from a harmonica could prevent her ice power. She look at her hands and try to use the ice power again, and without meaningless effort, she still has her ice power with her, yet that power doesn't show up when that scumbag played their harmonica. "How did they do that?" as Elsa asked in her mind.

"Do you mind explaining me how come do you have that power?" Jack gets closer to Elsa and look at her hands.

Elsa just stares at her hands, and all the sudden turn her backs on Jack. "Jack Frost is it? Will you help me get my necklace back?"

Jack shocked for a moment to be ask something all of the sudden like this. "Please will you help me?" Elsa continues her begging to him. It's not normal for her, especially someone with a trust issues with stranger, to ask someone that she just met and ask for an urgent help. "I know this comes up unexpected, but I feel that you'll able to help me."

"But I don't know if I can…"

Jack's word was cut off by slight of tears in her face.

"Please, it was given by my late father. I need to get it back!" Elsa holds Jack's hands tightly. He felt that feeling that she had. Jack sees to her eyes; Sadness, anxiousness, and scariness all sums up in her own eyes. Jack somehow hate to see that.

"I'm going to help you, but you're gonna tell me some things like how you came up with that power of yours."

"Thank you so much!" Elsa looks very much relieved and lead the way into the forest. "I'll tell you on the way. This way, I know this forest a bit well."

Jack starts to follow her, only to stop and go back to get an odd-looking wooden stick that lies beside him when he was down. "What do you need that for?" asked Elsa.

"I don't know." Jack shrugged, "But it might come in handy if those douche using their harmonica again. Maybe I can throw this to them if they started to play that thing again." Elsa is confused by Jack's decision but then she follows him into the wilderness of the forest.