Our tale begins as many do in the Pokemon World. It was in Pallet Town one day, while Ash Ketchum and Misty were taking a break from their journeys and duties as Gym Leader respectively to catch up with one another.

The two friends talked, as they often did, about old times and what the other had missed, though on that day, Professor Oak had invited them both over.

Ash and Misty were both at his lab, awaiting the professor, but they and Pikachu noticed a strange stone, one that seemed to be a ball of light.

"Hm? Hey, Ash, did you see that?" Misty asked, walking closer. "What do you think it is?"

"I'm not sure. Maybe it's a weird Pokeball, like the GS Ball from awhile back," the traveling trainer suggested. It was then that he noticed a note next to the ball. "Hm? A note?"

"What does it say?" Misty asked, watching as Ash began to read. All the while, Pikachu was poking and prodding the ball with curiosity.

"It's from Bill, the Lighthouse researcher," Ash said, recalling the man from his earliest days as a trainer. "He said he found this while trying to learn more about the giant Pokemon he encountered, but felt Professor Oak would make better use of it."

"Hmm...Whatever it is, it sure looks cute, but is it alright for Pikachu to be playing with it?" Misty pointed to the Pokemon before kneeling down and extending a hand. "Pikachu, can I have it?"

For a moment, the electric-type hesitated, before giving in and handing Misty the ball.

However, moments after it was in Misty's hand, there was a spark, with the trainer feeling a jolt go through her entire body. Misty gasped as she dropped the ball, a bright light of electricity emanating from her.

"Misty!" Ash cried, reaching out, only for his own hand to get shocked. He stumbled as the electricity traveled through him, as the light ball lost it's luster and Pikachu stared on in a panic.

After several moments, both Trainers began to shrink down, growing shorter and shorter as their bodies changed. Their ears grew longer, their limbs shorter, yellow and brown fur sprouted as they shrank down, their clothing becoming too big.

For Ash, the sensation had an odd familiarity, while for Misty it was entirely alien. After a short time, she realized she was changing into something else.

As the last sparks of electricity faded from them, the two were left far smaller than they had been, one a Pikachu in a hat, and the other with reddish colored fur atop her head.

"Wh...what's going on?" Misty squeaked, still able to speak normally.

"Oh boy, not again..." Ash gasped, back to his Pikachu form.

The one natural Pikachu stared on in confusion as his trainer and friend were now like him...

https://youtu.be/TEYG1ZXU2Pc