Author's note:
Cardcaptor sakura's universe is AU in the sense that the main characters speak English as a first language, but are in all other respects (names included) the Japanese characters. Also, character's appearances might not be described if all characters in that scene already know each other.
Chapter 1: Space vs Time vs Magic
"It was going to be a fun day today" said Sakura Kinomoto as she walked to Tomoyo's house, normally she would have rollerbladed, but the weather forecast called for rain and possibly thunder storms during the day, though so far only clouds had shown up. Her plan was to stay there for a month while her dad and brother were on a business trip. She was wearing her school uniform despite being on summer vacation since Tomoyo said to bring it.
"Yeah, and I'm look forward to Tomoyo's cooking" replied her partner Kero, who was riding in her bag. "Sure seems nice to not have magical mysteries to deal with" added Sakura, reflecting on how they had all 53 sakura cards in their possession, "Though I do miss Shaoran" she finshed. "Can you really fault him for wanting to spend some summer break time with his family" replied Kero. "He did say he'd be back later" Sakura replied, feeling better at the thought. "So I wonder what new costume Tomoyo has for you?" Kero asked with a grin. At that moment, amid the clouds, a portal began to open in a flash of brilliant pink light.
Yukito was standing outside a convenience store waiting to pick up a job application forum when his other self, Yue, sensed a powerful spatial force. Understanding what his true form was telling him, Yukito ducked out of the line and into a nearby ally, where a pair of white wings enveloped him, as he promptly transformed into Yue.
Up in the sky, a powerful being emerged from the portal, flying quickly as if it was being pursued. Its coloring was off white with purple higlights. It appeared to have sustained minor damage from something, since its armorlike skin was singed and scratched. It had a dragon like head, amethyst like gems on its shoulders, claws, and small wings on its back. Though it appeared to be flying not through them but by a supernatural force. Its name was Palkia.
A loud crash reverberated from the nearly closed portal behind palkia. Smashing thought the almost closed portal came another powerful being. This one was blue with silver highlights, and looks similar to palkia, but more beastlike. It glided though the sky the same way. Its name was Dialga. Within seconds, Palkia and Dialga resumed their battle.
Kero and Sakura were in the middle of discussing the day's plans when Kero stopped mid sentence and looked rather serious. Sakura gave him a questioning look. "Something is happening above is, but I can't sense what" he said. Sakura knew it had to be something serious if even Kero wasn't joking or complaining about the change of plans. "Let's get up there" she replied, and after making sure that no one was around, began to turn her key into a wand. Kero transformed from a plush toy like appearance to a winged lion/tiger like creature. "FLY!" said sakura as she took a card out with a picture of a large bird and placed it about her wand. The card changed into a pair of pink wings attached to Sakua, which magically lifted her into the air.
As Sakura and Kero rose above Tomoeda, Sakura called Tomoyo and explained what she knew. Tomoyo replied that she understood and then hung up, shortly after they were joined by Yue. The trio flew through the clouds, and noticed the battle going above them.
Both Palkia and Dialga were beginning to tire, as their battle had began long before they had reached the skies above Tomoeda. Igorning the cries of "Why are you fighting" and "Stop!" coming from below, they continued their battle.
Sakura soon realized that trying to talk to these creatures out of fighting was no use, Yue suggested that they use force to get their attention. After thinking of what might happen to Tomoeda if she didn't do something, Sakura reluctantly agreed. Holding out her staff, Sakura held out another card and chanted, "Wind become a binding chain", focusing on Palkia while doing so. Meanwhile Kero and Yue shot a burst of fire and a barrage of crystals at Dialga. Palkia turned and its eyes glowed. Suddenly, it seemed like the Windy card somehow couldn't reach it. Dialga glowed and the projectiles aimed at it slowed down, even the fire burning in slow motion, thus allowing Dialga to dodge them easily.
The battle continued like this for several minutes though Dialga and Palkia seemed more intent on attacking each other than anyone else. After yet another failed attack, Yue panted "Sakura, we need time to think of a new plan!". "Got it." replied Sakura. She took out another card with a picture of an old man with an hour glass on it and chanted. "Time, give us more time!". Almost instantly, everything around them stopped, even the wind. Sakura was about to relax when she noticed the black beast that Kero and Yue were after was... still moving?. Sakura and Dialga were both shocked, Sakura by the fact that her spell hadn't affected Dialga, and Dialga by the fact that time was being manipulated so well by other. Sakura's concentration on the time freeze broke as her strength wavered, and thus time resumed. Dialga was still surprised and thus didn't notice Palkia come from behind it and knock it spiraling into another portal that Palkia had just opened. Unfortunately for Sakura and her companions, the hastily generated portal was sucking them in like a vacuum. Since they had tired themselves out from the battle, all Sakura, Kero, and Yue could do was brace themselves, or in Sakura's case scream, as they were sucked in. Palkia, satisfied that it had won, retreated through another portal to a dark word full of the pokemon known as "Unknown". Sakura, Kero and Yue felt like everything was spinning and then, blackness.