Hello all, thanks for reading this story. You sent me some questions by PM and I have answered them in a FAQ you can see in my profile, so do not forget to take a look!

I'd like to thank anyone who followed/faved my story/me, it really means a lot. As we're in Christmas/New year period (at the time this chapter is written), this chapter is about Christmas and set up an important point of the stories. Which one? Just read, you'll discover soon enough ^^. If you're reading this chapter during this period, I wish you a merry Christmas and a happy new year!

Disclaimer: I don't own Pokemon

Code:

"Speech"

"Thought"

PokeAttack/Narrative important information

"Telepathy"

Chapter 1: Christmas in Kalos

Kalos, in a makeshift camp

"Everything is ready for tonight" Clemont said, as he finished the preparation of the last meal.

"Yes, the decoration is also done" Bonnie replied, as she attached the last garland.

"Dedenne!" Dedenne replied happily.

"I've done the dessert plate. We just need to wait for Ash to come back from it's training session and for William to come here, he said he will spend the Christmas Eve with us" Serena added.

Near the camp

"OK Pikachu: Thunderbolt, Greninja: Water Pulse, Talonflame: Steel Wing, Hawlucha: Flying Press and Noibat: Supersonic!" Ash yelled

His Pokemon then launched their attacks on the big rock in front of them, which exploded in fine dust.

"All right guys, let's stop here for today. Return" Ash said, as he returned all of his Pokemon besides Pikachu.

"OK buddy, once we're back at the camp, you will wait for me there" Ash told his Pikachu.

"Pika Pika Pika Pi!" Pikachu replied angrily, shaking his head.

Although Ash could not understand Pokemon language, after so much time spent with his Pikachu, he was able to understand him perfectly.

"I know you do not like to be separated from me, and me neither, but I still need to get gifts for my Pokemon, you included, and I do not want you to see your gift" Ash explained, trying to reassure his favorite Pokemon.

"Pika Pika" Pikachu sighed.

They then headed back to the camp, where Ash released all his Pokemon.

"Tonight, it's going to be Christmas guys, we are going to party all the night and have a lot of fun" Ash said with an excited tone.

His Pokemon all nodded with happiness.

"You can play together, I will be back soon. Later!" Ash explained as he left the camp.

Meanwhile, in Kanto

"Dragonite is unable to battle, Charizard wins. Since all six of Lance's Pokemon are unable to battle, the winner is William" the referee stated.

"Huh, you did a good job Dragonite thank you, return now and have a good rest" Lance said.

"These training sessions are really useful, but each time you literally destroy me…" Lance added, with a sigh.

"You keep improving a lot you know. This time you defeated my Emboar and you almost managed to defeat my Charizard as well, it was a great battle!" William said, as he enjoyed the battle he had.

"I still have a lot of training before being able to defeat your Blaziken though" Lance said as he began to laugh.

"Oh yes, you have this point" William replied as he burst into laughter.

"Do you want another training battle? Agatha is nearby and I know she would be interested" Lance asked.

"No, thanks. It would have been with pleasure but I have to go to Kalos, I'm waited there for Christmas Eve" William explained.

"Isn't Ash in Kalos?" Lance asked.

"He is" William replied.

"OK, I understand why you're going to Kalos then, say hello to him" Lance replied with a grin.

"I will, merry Christmas Lance!" William replied as he smiled back.

"Merry Christmas William!" Lance concluded.

William then exited the training field and went to the Pokemon Center. A few minutes later, he left the Center.

"Latios, I need you!" William said as he took a ball and released the Eon Pokemon. He then revealed his Mega Ring and pressed the Key Stone. Latios was soon covered by a pink sphere of energy. After a few seconds, Mega Latios was here.

William then climbed in Mega Latios back and said: "I need to go to Kalos, I will spend the Christmas Eve with Ash and his friends, when we will be in Kalos, we will find him the same way as usual". Mega Latios nodded and he took off.

A bit later, Kalos, in the forest

"I think I have enough, let's return to the camp." Ash said as he gathered his gifts.

"I hope they will love their gifts" he added, as he walked with two bags on his back.

20 minutes later, in the camp

"I'm back guys!" Ash said, as he dropped his bags off.

His Pokemon then all ran to greet him, happy their trainer was back. Pikachu particularly, went on his shoulder, nuzzling him.

"Yeah, I missed you too, little buddy" Ash said as he scratched behind Pikachu's ears, earning him a little "chaaaa" from his friend.

"Hey Ash, you're back! How was your training session? You left so quickly after leaving your Pokemon here, we couldn't even ask you a single question" Serena asked

"Oh it was great, but I had to find my gifts for tonight so we finished a little sooner than expected" Ash said, scratching the back of his head.

"Typical Ash" Clemont said with a smile.

"So, we're only waiting for William to start?" Bonnie asked.

"Yes, he should be there soon" Ash replied.

"Speak of the devil and he will appear" Clemont replied, pointing the sky.

They turned they head to the sky, and saw something like a jet plane heading to them. A few seconds later, Mega Latios landed. William then got off Mega Latios and petted him.

"Thanks Latios for the ride, you can go, see you later!" William said. Latios then returned to his normal form and took off again.

"William! Nice to see you, how do you do?" Ash said, happily.

"Hey Ash, hey guys, I'm fine thanks, I was training with Lance in Kanto, he sends you greetings Ash" William replied.

"Lance, like Lance the Kanto and Johto secondary Champion and the Dragon master? Clemont asked, astonished.

"Yes, it's him" William replied, with a smile

"How does he know you Ash?" Clemont asked, confused.

"Well, ..." Ash scratched the back of his head, "it's a long story, I will tell you later when we will speak about stories. Anyways let's get started with the party" he added.

As Ash's Pokemon were already released, Serena and Clemont then released all their Pokemon, and William released his Blaziken.

"Do you only release your Blaziken?" Serena asked.

"I came with Blaziken and Latios only. I had already released all my Pokemon besides Latios and my training team this morning. Some of them wanted this time to organize themselves a giant party for this Christmas. Some of them still wanted to come with me, but I convinced them to do this giant party for Pokemon only. Blaziken obviously stayed with me as would have done Ash's Pikachu. Latios should already have rejoined them right now." William explained.

"Isn't this dangerous? I mean, you could be an easy target with only one Pokemon with you" Bonnie asked, worried.

"An easy target? With Blaziken around? Come on Bonnie, Blaziken has already won on 1vs6 simultaneous battles without even being hit." William said as he petted his Blaziken.

"Yup, both Ash's Pikachu and your Blaziken are a phenomenon, but let's begin, we have dinner to eat!" Clemont replied happily.

Everyone nodded in agreement.

After a hearty meal during which Ash explained to his Kalos friends some of his adventures, like the ones when he met Lance, Serena brought the dessert plate.

"Wooow" Bonnie said.

"Dedenne De" Dedenne nodded.

"It's beautiful" Ash added.

"It seems we have a bunch of delicious meal" Clemont said.

"Well done Serena. Is the cake a lie?" William asked.

"What?" Serena replied, confused by the question.

"Nothing, never mind." William replied. "Will I one day stop making those pointless references?" he thought.

10 minutes before Christmas

"I'm coming back in a few minutes guys" William said as he exited the camp with Blaziken. They then walked a little and they came face to face with a Pokemon.

"Great, you're here, just in time, perfect! I have your Pokeball just here, return and wait until you are called" William said as he returned the Pokemon. They then went back to the camp.

"Hey everyone, it's almost midnight, what do you think about giving our gifts?" William asked.

"Oh yes, gifts!" Bonnie replied happily.

"We definitely should" Clemont added.

"What a good idea! What do you think Ash?" Serena added.

"You're right, let's do this!" Ash said, with an excited tone.

Serena was the first to offer her gifts. She gave to her Braixen a special outfit she could use during performances and a new pair of sunglasses to her Pancham.

"For Bonnie, a bag of your favorite candy" Serena said.

"Oh yes, thank you Serena" Bonnie replied.

"For Clemont, the latest kit to create inventions. I hope they will stop to explode" Serena said with a laughter.

"Thank you Serena, but my inventions does not explode!" Clemont replied, a little offended by Serena's taunt.

"For William, I had no clue but I thought this picture of the five of us, who was taken the first time we met, could be a good idea" Serena explained.

"Thanks Serena" William replied as he looked at the picture.

"And for Ash… I found an exact copy of the ribbon you offered me last time, and I thought it would be awesome if we both have the same ribbon." Serena said with a blush.

"Thank you Serena, it's great!" Ash replied.

Clemont then offered his gifts. He gave an automatic macaron distributor to his Chespin, distributor which exploded after the first use right in Chespin and Clemont faces, an ear improvement system to his Bunnelby and a portable electric shower to his Luxray. Luxray went on the electric shower to try it.

"For Bonnie, the book about Pokemon's healthcare you were looking for" Clemont said.

"Oh thank you big brother" Bonnie replied as she hugged Clemont.

"For Serena, a new hat you can use during your performances" Clemont said.

"Thank you Clemont, it is perfect" Serena replied.

"For Ash, new running shoes, they will allow you to run even faster… But do not let me behind right?" Clemont asked, but he knew he will not be able to keep up.

"Thanks Clemont" Ash replied.

"And for William, I know you have a lot of Pokemon so I created you this intelligent Pokeball suitcase. Let me do a demo. You first select if the Pokemon is a legendary one or not, then you select the region, and after that all you need to do is *BOOM*" Clemont could not finish his sentence, the suitcase exploded.

"Thanks Clemont, but I think I will continue the old way" William laughed.

It was Ash's turn. He first took the first bag and opened it to reveal hundreds of berries he gathered in the forest for his Pokemon. They were really happy as they began to eat.

"For Bonnie, a Soothe Bell for Dedenne, it will help to boost your friendship with him" Ash said.

"Yippee, thank you Ash, it's really great!" Bonnie replied with an excited tone.

"Dedenne De!" Dedenne nodded.

"For Clemont, a book on how to make inventions which do not explode" Ash said with a laughter

"Thanks, but I already told you that my inventions do not exp *BOOM*" Clemont could not finish, his electric shower just exploded, leaving a furious Luxray.

"Luxray, is everything all right? Sorry about this!" Clemont said as he rushed to his Pokemon.

During a few seconds, everyone burst out laughing. Then Ash continued to give his gifts.

"For Serena, a new performance dress made by Valerie, I know it will suit you perfectly" Ash said.

"Oh my… Thank you so much Ash!" Serena replied, but she could not hide her giant blush.

"For William, I found this stone on the New Island the first time I met Mewtwo. As Mewtwo made us forget about what happened, it took me some time to realize it was the stone I found there. I kept it as a souvenir of the first time I saved the world. You believed in me ever since I began my journey, and this one is for you. Ash said, with pride.

"Thank you so much Ash… Oh my… Ash, do you know what this stone is?" William asked, shocked.

"Huh, no, is it a special stone?" Ash asked.

"It's a Mewtwonite Y, it allows Mewtwo to Mega-Evolve to Mega Mewtwo Y" William replied, still in shock.

"Wow, so Mewtwo can Mega Evolve" Ash replied, a little frightened of what a Mega Mewtwo could do.

"Yes, I will try this Mega Stone as soon as tomorrow, thank you Ash" William replied.

"I have one last gift, for you my little buddy" Ash said

"Pika Pi?" Pikachu said

"I know you are really powerful, much more than any Pikachu or Raichu I've ever seen, but I know you can still improve yourself. I was able to find this Light Ball for you, it will help you increase your power" Ash said.

"Pika Pi!" Pikachu replied happily.

Finally, it was William's turn to give his gifts.

"For Bonnie, a Pokemon healthcare kit for Dedenne, it will fit perfectly with the book Clemont gave you" William said.

"Thank you, it's great!" Bonnie replied happily.

"For Clemont, a ticket for the Kalos inventors' show, it will allow you to meet the best inventors around the world and to disclose your inventions, you should double check they won't explode" William said with a laughter.

"Oh, thank you! I will do my best!" Clemont replied.

"For Serena, an invitation to a special one-to-one training session with Aria, the current Queen of Kalos" William said.

"Oh my… Thank you! This time I will recognize her" Serena replied, as she remembered the time she met with Aria without recognizing her.

"And last but not least, for Ash…" William then grabbed a Cherish Ball.

"Didn't you say you came with only Blaziken?" Ash asked, confused.

"I did, but just before midnight I exited the camp for a few minutes, I had an appointment scheduled with this Pokemon." William replied. He then gave the Cherish Ball to Ash and added "This is a gift from both Arceus and me".

Ash was confused about the last part of the sentence. What could Arceus want to give him together with William? He suddenly got it.

"Could it be?" Ash asked. He then decided to release the Pokemon in the Cherish Ball to be sure. The Pokemon, immediately after being released, tackled Ash.

"Latias! It's so good to see you again!" Ash said as he began to tear.

After a few minutes of hugging, Ash stood up.

"So, you're telling me you're lending me Latias for Christmas?" Ash asked.

"No, not this time. You know, I already lend you some legendaries from time to time. It would not have been a special gift, do not forget this is not only mine, but also Arceus' gift." William said, teasing Ash.

While Ash was thinking, William began recalling what happened a few days ago.

Flashback, Hall of Origin

Arceus was looking on Ash's training session with his Pokemon.

"Ash is really kind with his Pokemon. He is also becoming a very good trainer." Arceus said, thinking aloud.

"Yes, he is not The Chosen One for nothing" William said, as he walked to Arceus.

"Oh, William, you are here. You want to look at The Chosen One with me?" Arceus asked.

"Why not?" William replied.

After a few seconds, William broke the silence.

"You really like Ash, don't you?" William asked Arceus.

"Yes I do, he is the most kind human I've ever met, he saved the world so many times that I stopped counting, he even saved my life. All legendaries have heard about him and almost all have already met him. Many of them like him very much. The more I look at him, the more I realize I would really like to help him on his journey" Arceus replied.

"Well, if you think that, then it's time for Ash to learn how to control legendaries." William said, with a serious tone.

"Do you think so? I thought we were going to wait for you know what to let Ash control my children." Arceus asked, confused.

"Well it will obviously be a click, but if we wait for this, the watershed may not be in our favor, and I don't think it would be too risky to let Ash begin to control legendaries right now, but we mustn't rush it and we have to limit it to a few legendaries before you know what." William replied, thinking about what to do.

"Hmm, you may be right. Let's do this then. When do you want to start and with whom?" Arceus asked.

"For the 'when', it's Christmas in a few days, it would be the perfect event to start. For the 'who', I think you already know her" William replied with a smile.

"What a good idea! Let's do this. It will be our combined gift for The Chosen One. I know he will not do that but I still need to say it. He mustn't abuse their power." Arceus replied.

"He will not, but I will tell him personally" William concluded.

Flashback over

"So Ash, in case you haven't figured it out already, Latias will be your Pokemon" William said.

"But, isn't she your Pokemon already?" Ash asked, a little confused.

"Yes, but she will be yours too. Allow me to explain. Do you see this Pokeball? It's not a normal ball. It's a Cherish Ball. All my legendaries are caught into Cherish Balls. These Pokeballs are special as they allow the strongest Pokemon (mostly legendary ones) to be caught in more than one ball at a time, providing all the balls which caught one Pokemon are Cherish Balls. You can not catch a Pokemon already caught with a regular Pokeball with a Cherish Ball and you can not catch a Pokemon already caught with a Cherish Ball with a regular Pokeball. When a Pokemon caught by multiples Cherish Ball is returned, he is in all the Cherish Ball at the same time and can be released by any of the Cherish Ball which caught him. Thanks to Cherish Balls, we can both be Latias' trainers. The same will apply to any legendary who will join you, as she is the first but won't be the last" William explained.

"So… Latias will join my team… And other legendaries will too…" Ash said, astonished.

"Yes, but you have to know that you mustn't abuse their power. Arceus will not forgive you if you do you know" William explained.

"That's obvious. You know as well as I that all my Pokemon are like my family" Ash replied.

"I know, but better safe than sorry. But Arceus and I both think it's time for you to start training legendaries." William concluded.

"Holy shit! Ash, do you really realize that you just literally became a legendary trainer?" Serena asked, completely shocked.

"That's completely incredible" Clemont added.

"It means we will be friends with a lot of cool Pokemon" Bonnie said, excited.

"So, how does this work?" Ash asked.

"I get Latias' Cherish Ball back and I give you a bunch of Cherish Balls, then, you catch Latias" William replied, as he took Latias' Cherish Ball back and gave Ash a large amount of empty Cherish Balls.

"Latias, are you ready?" Ash asked.

"Latias!" Latias nodded with a large smile. Ash then tapped the ball on Latias' head and she got sucked into the ball. The ball then pinged instantly, Latias was caught (again).

"So William, you are accustomed to training legendaries. What exactly should I do and what should I not do, I want to be sure to not angry Arceus" Ash asked.

"Just be yourself, you won't do it. If you want more specification, you obviously should not use legendaries in all your battles. If a legend specifically wants to battle, obviously you can use him, if you have to teach a lesson to someone, you can also use legendaries without problem. If you're battling someone you know would like to battle legendaries, then you can. If you have to take a real revenge against someone who hurt you, legendaries will be happy to help you to humiliate the guy. If you think a battle will be a good training for a legend, you may use him. There are many situations, just ask yourself and you will find your answer. Arceus won't blame you if you misjudge from time to time, but if you tend to misjudge all the time, and I know you won't, then you could be worried. Another point, do not show to all passersby that you have a legendary Pokemon. I've been training legendaries for years, and if almost everyone know I have at least one legendary, no one but you know how many legends I have" William explained.

"OK thanks. I will prove myself worthy of your trust" Ash replied.

"We know you will" William concluded with a smile. Ash then released Latias.

"Latias, what do you think about a training session?" Ash asked to his new Pokemon.

"Latias!" Latias nodded.

"Same Ash as usual, ready to train even by night" Serena said with a smile.

The next morning

As everyone woke up to eat breakfast, Ash got an idea:

"William, your Pokemon will come back today right?" Ash asked.

"Yes, Latios should head back with my Pokeball in a few minutes, you want to see Mewtwo Mega Evolve, I'm right?" William replied.

"Oh yes, but I want to fight your Mega Mewtwo with Latias!" Ash said, excited.

"Why not, but do not forget that Mewtwo is already stronger than Latias without Mega Evolving, but I know you're talented enough to not care about this" William replied with a smile.

"Of course I do not care" Ash replied.

15 minutes later

"The unofficial one-on-one battle between William and Ash will begin. Trainers, call out your Pokemon" Clemont stated.

"Mewtwo, go" William said.

"Latias, I choose you" Ash yelled.

"Mewtwo VS Latias, battle begins"

William then revealed his Mega Ring and pressed the Key Stone. Mewtwo was soon covered by a pink sphere of energy. After a few seconds, Mega Mewtwo Y was here.

"Latias, begin with Dragon Breath"

"Mewtwo, dodge and use Future Sight".

Latias fired a Dragon Breath to Mewtwo but he successfully dodged it.

"Latias, use Dragon Pulse"

"Mewtwo, dodge again and use Aura Sphere"

Latias fired his attack but Mewtwo dodged it and launched a powerful Aura Sphere to Latias, who couldn't dodge it and yelled in pain.

"Latias, use Psychic"

"You too, Mewtwo!"

Both Pokemon used Psychic, but Mewtwo, in his Mega Form and with years of mental training, managed to overpower Latias.

"Latias, you need to"

Ash could not finish is sentence as Latias got struck by Future Sight.

"Mewtwo, end this, use Psystrike"

Mewtwo then fired his signature move which knocked out Latias.

"Latias is unable to battle, Mewtwo wins. Since Ash's Pokemon is unable to battle, the winner is William" Clemont stated.

"Good job Mewtwo" William said, petting his head and then returned him

"You did your best Latias, I'm proud of you" Ash said as he hugged Latias before returning her.

"It will take you some time to get used to battle with legendaries. You will soon become much better" William said, trying to reassure Ash.

"I will train and one day, I will be the very best" Ash said in a motivated tone.

"I know you will" William replied with a smile.

And that's all for today. I wanted to end just after Christmas as it is a Christmas chapter. Thanks for reading the story so far. Do not hesitate to ask my any question via PM and requests via PM/review. I'm open to any constructive review or to anything to improve myself. Next chapter will also set up another point. Do not forget to take a look to my profile because of the FAQ. Stay tuned!

Little update: I realize that the chapter is not clear on one point: No, legendaries caught in Cherish Balls are not "multiplied". If a legend is let out from a Cherish Ball, he is no longer in any Cherish Ball and has to be returned to be able to be released again. He can be returned to another Cherish Ball which has caught him though (for example, if Ash let Latias out from his Cherish Ball, William can return her to his own Cherish Ball and Latias is again in the two Cherish Balls).