Ash has transformed again! But when a pokemon side of him becomes more than it really is, can he handle the evil of the strange group turning pokemon into mindless slaves?

This is my first story, first few chapters aren't the best.

Ash, Max, Brock and May were on their way to Ash's next frontier challange.
"Okay, now we go..." started Max, then he said "Woah, the Sliph Co. building is on this path!" Ash looked at him
"The what?" he asked, confused.
Max sighted "Silph Co. is one of the biggest companies in the world, they invented pokéballs, the capture styler and..." Max continued to ramble on and on until he said "Their also developing new types of pokéballs that makes it easier to catch pokémon" After a short conversation, they decided to check out the building.
"Woah, this place is huge" May gawked, after steping into the office bulding.

"Are you sure this is where the twerps went?" asked Jessie, hirritaded
"Yeah, I'm sure" said Meowth, pointing at the office building "They went in there" James looked at the building
"That Sliph Co. HQ, and remember what they made there?" he said, then Jessie and Meowth remembered the story
"THE MASTER BALL!" Ash and his friends walked through the bulding, soon they reached the main desk.
"Hello, welcome to Sliph Co." said the young man behind the desk "How can I help you?". While Brock talked to the employe, Ash noticed that Pikach looked worried
"What's wrong buddy?" he asked.
"Pika pika chupi" Pikachu said, but then he smaked his forehead, Ash can't understand him
"Ash, come on! Were going on the tour!" May yelled,
"Coming!" he said, running to them
"Pika pika" Pikachu sighted, following Ash to the lab entrance, jumping on his shoulders
"Okay, this is our chemicals deparment" said the tour guide, after they entered the lab, the tour guide started to talk about confusing things, like atomic make up, genetics, with Max taking in every single word.
"Excuse me, whats that?" asked May, poiting at a vile of yellow liquid,
"That's a prototype of a serum to understand pokémon, right now, its limited to pikachu and it has really nasty side-effects, one of the testers ended in a coma after drinking it" said the guide his smile dying for a moment,
"Huh, whats that noice?" Max asked.
"I don't" said the guide, but he cut when a giant mecha broke the wall.
"Prepare for trouble" said Jessie
"And make it..." James started to say but he was cut off by Meowth screaming
"NO TIME FOR THE MOTTO! WE HAVE TO GET THE MASTER BALL!" Jessie and James mumbled
"Team Rocket! What do you three want!?" asked Ash, Jessie ansewed
"We want the Master Ball, twerp so stay out!" the guide laughed,
"The Master Ball? That thing is gone." Meowth screamed
"WHAT!, No issue we'll just take Pikachu then!". The mecha's harm moved to grab Pikachu.
"No you don't!" Ash yelled as he got in front of the hand.
"Hugh, come on, really?" said Meowth, suddenly the hand smacked him away to the table with Pikach serum. CRASH.
"Ash!" Max screamed
"Now we... uh?" said James
"AHHHH, THIS THING IS OVERHEATING!" Screamed Meowth. BOOOOOOM!.
"LOOKS LIKE TEAM ROCKET BLASTING OFF AGAIN, WOOBUFETT!". After Team Rocket blasted off, all of Ash's friends ran to him, but only found his clothes.
"Ash!" Brock said "Where are you?" Pikachu ran to the clothes.
"Ash!" Pikachu yelled, he then looked inside the hoodie, and gasped when he saw a yellow furball.
A Pikachu.