This is mostly the Fairy Tail story. Some changes from the Sun/Moon story.
The girl who helped saved Alola from the disaster and defeated the Elite Four had suddenly disappeared. Before she disappeared, she left the champion position vacant, saying she doesn't want to become champion yet, as she only wanted to have adventures not fame.
=One Month Later=
A young girl with blonde hair and green eyes along with a tanned green-haired boy walked towards a house.
"Um... Is anyone home?" The girl said.
"Hello!" The boy shouted.
A tanned woman opened the from the inside along with a Meowth and notices the two visitors.
"Hau! Lillie! It's so good to see you!" The woman greeted, "Come inside!"
"Meowr!"
Lillie and Hau were sitting on a couch while Hau was playing with Meowth.
"Make yourselves at home!" The woman cheerfully said while giving tea and malasada to them.
"Malasada! Thanks a bunch, Ma'am!" Hau, along with Meowth, started eating malasada.
"*Sigh* You two..." Lillie then turned to the woman, "Ma'am, It's been a month and I'm sorry that we're only informing this to you now but..."
She suddenly reacted to what Lillie said, "A month? Wait a minute... didn't Cyra told you?"
"Hm? Told us what?" Hau asked while still munching his food.
Cyra's mother sighed, "Honestly, that girl... she has this habit of forgetting to tell others about where she's going.'
"So... does that mean you know where she went for the past month?" Lillie asks in curiosity.
"She's not in Alola right now. She went to the continent of Ishgar to visit her brother." She informed.
"Wait. Cyra has a brother?" Hau asks.
"Hm-mm. Her younger twin brother. His name is Cyrus." She notices Lillie being silent, "What's wrong, Lillie?"
"I'm actually relieved that she's all right." Lillie told her.
"Yeah, me too. We thought that she was in some kind of danger." Hau sighed in relief.
"Meowr?"
"Ishgar?"
"Her mother told us that's where she went." Lillie informed Prof. Kukui.
"I see." Gladion said.
Lillie was startled, "Brother! You're here, too? What are you doing here?"
"Obviously, to check up on you." Gladion blunty said.
"Heheh! You're worried about your little sister, huh?" Hau cheerfully said.
"You're noisy."
"Ishgar... now that's a surprise.' Prof. Kukui said.
"You know about it Prof.?" Lillie asks.
"It's a continent not far from here. Apperently, it's a place that's not inhabited by pokemon."
Lillie, Hau, and Gladion were surprised at that info.
"Whoa! Seriously?!" Hau loudly asks.
"Yep. I heard that it's a country of magic and people who have supernatural abilities there are called mages or wizards."
"Amazing." Lillie commented.
"To think people also have supernatural powers." Gladion said.
"Come to think of it, I heard that pokemon have started appearing in Ishgar, wgich is unusual." The Kahuna, Hala, said from behind the three, startling them.
"Where'd you come from!?"
"Pokemon inhabiting Ishgar?" Prof. Kukui said.
"Yes, there are recent sightings of Alola pokemon appearing there." Hala informed him.
"Hmm..." Prof. Kukui then turned to Lillie, Hau, and Gladion, "You three, can I ask you a fav-?"
Hau cutted him off, "No need to tell us, Prof.!"
Lillie nodded, "I think I already know what it is you're asking for."
Gladion sighed, "...Fine." He agreed silently.
"All right! Let's go, guys!" Hau said.
=Ishgar-Fairy Tail Guild (Second Building)=
At the same time...
"I'm not gonna let you guys disgrace Fairy Tail's good name!" Romeo shouted at Twilight Ogre as he lets out a purple flame.
"Romeo!" Wakaba said in worry.
"Stupid kid!" Romeo's father, runs towards his son.
One of Twilight Ogre's goons blew the flame out in ease, "Hate to tell you, but things have already been disgrace!"
"Leave my boy alone!" Macao said as he tries to stop him but is too late as the guy gets his metal club ready.
"You can train hard your whole life, and there's still no way you'll ever beat me!" The scoundrel was about to hit Romeo but, at that moment, someone kicked him from behind and send him flying across the guild.
"Who in the hell!?"
Suddenly, the Twilight Ogre gets freezed, hit by something metal, slashed, and smashed by a giant hand. The pink-haired boy with canine teeth smiled. The Tenrou Team has made their comeback!
"Look who's back!"
"Sorry to keep you waiting for so long!" Happy said.
"We're gonna need a bigger guild hall for this racket!" The third guild master, Makarov, said after he saw their guild's second building.
"I-I dont believe it..." Macao is so shocked that he could barely say anything.
"No way..." So is Wakaba.
Laki, Nab, and Vijeeter approached them in happiness and tears of joy.
Laki: "You look so young!"
Nab: "It's like you guys haven't age a day in seven years!"
Vijeeter: "Tell us what happened!"
Lucy: "Uh... well...
The Tenrou Team then explained what happened to the other guild members and about how they were saved by the first master, Mavis Vermilion. There are also some things that happened after that.
"The boat got destroyed because of Natsu and Gray, eh?" Wakaba said in a deadpanned expression, no surprise there.
"No wonder some of you are so wet." Macao said, referring to Erza, the cats and some others.
"Wait. Then how are you able to come back here?" Nab asked, "Did you swim?"
"Nope. Someone picked us up." Max told him.
"Who?"
"It's me, you idiots!" Cyra said as she entered the guild. She is a girl with platinum blonde hair (long and straight with sideswept bangs) and blue eyes. She wore dark gray clothing with sleeves that only reached her elbows and a short-sized skirt. She also wore white long gloves and boots with black thigh socks and a blue handbag with a pokeball on it. She is only a few inches shorter than Lucy.
"Cyra!"
"What's took you so long!?" Natsu asked.
"It's not easy helping repairing a boat that you severely damaged." Cyra bluntly told him.
"Oh yeah, I never met her before." Lucy said, realizing that she never met Cyra seven years ago.
"Her name's Cyra and she's a pokemon trainer of our guild." Makarov explained.
"Pokemon Trainer? What's that?" Wendy asks.
"You'll learn soon enough."
"Hey, Cyra. Where's Cyrus?" Mirajane asks.
"When I contacted him, it seems he was out of town for a while. He told me he'll be back soon." Cyra explained.
Suddenly, a Lopunny came out of her pokeball and started to shriek. Wait. She can TALK!?
Fanfic Info: In Ishgar, magical energy called Ethernano are everywhere. This can also cause an effect to some animals and pokemon, which gives them the ability to talk.
"WHOA!" Lucy and Wendy were startled, while Gajeel and the two exceeds (Carla and Panther Lily) stared in surprise.
"Kyaaa! When is Greninja going to come back!?" Lopunny shouted at... herself?
"Buneary, it's been a while." Erza greeted.
"Ah! Erza and you guys! I missed you guys so much!" Lopunny said as she hugs Erza.
"Um, Erza. She's Lopunny now." Cyra corrected her.
"Cyra, Cyra! When is Greninja going to come back? I won't let anyone become my rival for his love!"
"It's going to be soon, don't worry." Cyra reassures her.
"... Looks like we've got another Juvia here." Lucy sighed while the others laughed.
Natsu turns around, seeing Romeo staring at him in shock.
"Look at you, Romeo! All grown up!" Natsu commented with a smile.
Romeo then had a fit of tears and finally smiled for the first time in seven years, "...Everyone, welcome back!"
At the exact same time...
A boat (from the Sun/Moon game) approaches Ishgar with three people on it.
"So that's Ishgar. The Kingdom of Fiore." Gladion said.
"Yeah! That's so cool!" Hau cheerfully said.
"Would you turn it down a notch?" Gladion told the noisy, yet cheerful trainer.
Lillie looked at their destination in awe, "Cyra is there... I wonder where she is..."
Lillie notices thather bag started moving, "Nebby, we're in a new place now. So don't wander off, okay?"
Nebby nodded and smiled.
Did you like it? Please review. :)
Notes:
Cyrus: Male name, means "Sun" in Africa.
Cyra: Female name, means "Moon" in Persia.