I DO NOT OWN POKEMON, THIS IS JUST A FANFIC AND IF YOU GOT PROBLEMS WITH THIS FANFIC THEN DON'T READ IT.

Human speech: "Hi"

Pokémon speech: "Pikachu"

POV: 'Hi', 'Pikachu'

Transformed Ash speech: "Greninja"

As Ash was battling something unexpected happened, Ash was also enveloped in the same shooting water like Greninja.

"Huh?" Serena said with a shocked face.

"What's happening to ash?" Bonnie questioned.

As Ash was inside the shooting water, his form was also changing drastically. Ash's clothes disappeared and his body structure was changing, his skin turn to a shade of blue that matches the blue skin of Greninja, his hands and feet grew larger and turned into webbed feet and hands. He lost his hair and grew fins on his head, his belly became yellow and some patterns appeared on his body. The only thing that was left was his Brown eyes.

"AHH! IS ASH TURNING INTO GRENINJA!?" Serena said in a very distressed state.

As the transformed Ash looked at Ash-Greninja they both nodded meaning they will attack.

"This is unbelievable! A human transforming into a Pokémon?" Clemont said in disbelief.

As Ash and Ash-Greninja were battling, Ash used water shuriken and hit one of the Beedrill. After that, the Beedrill retreated and Greninja turned back to normal while Ash was still a Greninja.

"Ash!" Serena screamed.

"Gre...n" *faints*

"Oh no Ash!" Bonnie said.

"We have to take Ash to the Pokémon center!" Clemont replied.

As Clemont carried Ash to the Pokémon center, they didn't know that Team rocket was spying on them again.

"Say, what's that nerd twerp carrying Greninja?" Jessie asked.

"I don't know, but we should be focusing on gettin Pikachu!" James replied.

"And the machine were gonna build will take time" Meowth said.

Serena, Clemont, and Bonnie finally arrived at the Pokémon center to check on Ash.

"Nurse Joy!" Shouted Clemont.

"Yes?" Nurse Joy answered.

"Please tell me that uhm, uh... GRENINJA! is um, fine?" Clemont said anxiously.

"Seems like Greninja has just passed out, but don't worry! It's fine!" Nurse Joy said.

"Phew!" Serena said.

Clemont laid down Ash on a nearby couch and they waited for him to wake up.

"Will Ash stay like this forever?" Serena asked.

"Well, since Greninja's and Ash's synchronization was so strong during the Beedrill, Ash may stay like this for a few days or less" Clemont replied.

"So, it's not permanent?" Serena said.

"It's only temporary" Clemont replied.

"Ok, good!" Serena said with a relieved face.

"I wanna be a Pokémon like Ash!" Bonnie said with a jealous face.

A few minutes passed and Ash was still passed out, the impact of the synchronization was too powerful and it knocked him out.

"Gre..nin"

"Ash!" Serena said in relief.

"Ja?"

"It seems like Ash is not aware that his a y'know" Clemont replied.

"Greninja?"

"Uhm Ash, there's something you need to see..." Serena said will pulling up a mirror.

Ash was confused that instead of his reflection, it was a Greninja. As Ash went ahead to scratch his head, the Greninja in the mirror did the same thing, Ash was surprised and confused that the Greninja in the mirror did the same thing so he did some movements and the Greninja did every movement Ash did, so he concluded that HE was the Greninja.

"GRENINJA!"

"Ash calm down!" Serena said to ash.

Ash was so surprised and was looking everywhere on his body since he was surprised that he turned into a Greninja.

"Gren..." Ash sighed.

"Don't worry Ash! It's only temporary!" Bonnie said to Ash.

"Nin?"

"Yeah, Bonnie is right!" Serena replied.

"Grenin" Ash nodded.

A few minutes have passed again while Ash was looking at his new body, Clemont was researching, and Serena was brushing her hair. An unexpected friend had visited the Pokémon center.

*Huff's and puff's* "Finally! I'm at the Pokémon center!" A mysterious and somewhat similar voice called out.

"SAWYER!?"

"GRENIN!?"