Puppets of the Parasite

Back in Pallet Town, within the Ketchum household were Delia, Mimey and Professor Oak, who had learnt about the situation Ash, Pikachu, Dawn and Buneary were put in and were watching the television to see what Delia's son her, Dawn and their Pokémon would have to face, but after hearing of all the obstacles her son and his friends had over came, Delia knew that there was no denying his victory against whatever evil he, Dawn, Pikachu and Buneary would have to face against.
With Ash, Pikachu, Dawn and Buneary, they were taken to another one of the Champion Hunter's Death Zone Stadiums, however, the Pokémon Trainers and their Pokémon couldn't see their enemy as the room was poorly lit, but that didn't mean that they had the disadvantage in their fight.
It was then Pikachu's ears perked up at the sound of movement emitting from within the darkness, in which Pikachu's cheeks charged up with electricity, in which the yellow mouse let out a loud 'Pikachu!' before he unleashed a bolt of electricity from his cheeks into the darkness.
After waiting a moment to see if Pikachu's attack had hit the unknown enemy, Pikachu climbed onto Ash's shoulder, before the pair slowly and carefully headed into the darkness to find out who or what they were up against, unaware of what was going to happen to them.
Back to Dawn and Buneary, the pair were starting to get worried, as they feared whatever lurked within the darkness had anticipated the four of them to split up, before picking them off.
But it was then their worry turned to relief as Ash and Pikachu slowly walked out of the darkness, with their heads lowered, however, something didn't feel right, in which Dawn then asked in a curious tone, in order to break the silence. "So, did Pikachu take care of whatever it was that was bothering him?"
However, Ash didn't respond, which caused Dawn and Buneary to feel nervous again, before the dark blue haired Pokémon Trainer asked. "Ash? You feeling alright?"
"Pikachu... Use Thunderbolt..." Ash then commanded in a distant tone, in which Pikachu obeyed and unleashed a bolt of electricity from his cheeks right at Dawn, who was then forced to the ground by Buneary, both narrowly avoiding the attack.
"Ash, what are you doing?" Dawn questioned in a confused tone, as she and Buneary got back up, only for Ash to reply, as he lifted his head, revealing his eyes were clouded and hazy. "I only want you to be proud of me..."
Ash's response only confused Dawn and Buneary, but it was then they were horrified as five cerise coloured arachnid-like legs emerged from both sides of Ash's neck, adding up to a total of ten, in which Ash then said in the same distant tone, as a series of tentacles formed before him and began to charge with light crimson energy. "Please come back dad... I just want us to be a family again..."
It was then the tentacles began to fire blasts of light crimson energy at Dawn, who managed to dodge the blasts, before Ash then commanded to his manipulated Pokémon. "Pikachu destroy Buneary..."
"Pika..." Pikachu replied in the same trance-like tone as Ash, as the yellow mouse nodded his head, before he charged at Buneary, as his tail was surrounded in white sparkles and was then surrounded in a white outline, in which the Rabbit Pokémon realized that Pikachu was going to use Iron Tail, in which she used Bounce to counter the attack and protect herself from harm, however, she was proven wrong when Pikachu's tail stopped glowing as his body was then surrounded by golden electricity, before he jumped into the air and slammed Buneary in the stomach with a powerful and painful Volt Tackle, before the Rabbit Pokémon fell to ground, landing beside Dawn.
"I don't understand. Why is Ash doing this?" Professor Oak questioned.
"I'm not sure. But I know one thing." Delia replied, which intrigued Professor Oak as to what Delia meant, in which she then said. "That isn't my Ash."
"Please, dad... Come back home and see how strong I've become..." Ash said in a still distant tone, as he continued to fire blast after blast at Dawn, who managed to keep on her toes and avoid each attack, before she called out. "Ash, listen to me. You and Pikachu have to fight Parasimon's control!"
Back in the Ketchum residence, Delia, Mimey and Professor Oak were confused as to what Dawn was pleading, until they heard a wicked laugh and watched as what looked like a cerise coloured spider, with a gruesome eyeball and a mouth growing out of his back emerged from the darkness, before they realized why Ash and Pikachu were acting so weirdly, in which they could see a set of tentacles connected to the back of Ash's neck and Pikachu's neck from the monster known as Parasimon's mouth and figured out Parasimon was controlling them like puppets.
"Yee-Ha!" Parasimon then exclaimed, before he pulled Ash and Pikachu back with his tentacles, so they were both in front of him, before he commanded in a vile and amused tone. "Now, let's have some fun! Pikachu, I order you to use Thunder!"
Unable to disobey Pikachu then fires a massive beam of electricity from its body at the opponent, as Ash unleashed another blast of light crimson energy, which combined with Pikachu's Thunder, transforming the attack to a violent bolt of red destruction, which headed straight for Dawn and Buneary.
"Ash!" Dawn called out loudly, in which everyone watched in awe as Buneary began to glow brightly, and as the light faded, it revealed Buneary had Evolved into Lopunny, in which the newly Evolved Pokémon quickly wrapped her arms around Dawn and jumped high into the air, gracefully avoiding Parasimon's deadly red lightning.
It was after the pair landed safely on the ground that Dawn then pulled out her Pokédex and held it toward Lopunny, in which her Pokédex informed her about the information it had on Lopunny. "Lopunny, the rabbit Pokémon. Extremely cautious, it cloaks its body with its fluffy ear fur when it senses danger or quickly bounds off with its graceful legs."
However, Buneary had a look in her eyes, telling Dawn that she wasn't going to run away, in which the female Pokémon Trainer nodded her headed and commanded. "Go, Lopunny and use Dizzy Punch!"
Doing as she had been commanded, Lopunny ran towards Ash and Pikachu, in which through Parasimon, Pikachu then charged at Lopunny, as Pikachu's body was then surrounded by golden electricity, indicating he was going to use Volt Tackle again.
However, Parasimon was then shocked when Lopunny proved she wasn't to be underestimated, as the Rabbit Pokémon quickly appeared behind Pikachu and slammed her right fist into the back of Pikachu's neck, squashing Parasimon's form of controlling the yellow mouse, who then closed his eyes, but was caught by Lopunny, in which she couldn't help but to smile, knowing her mate was safe, however, Lopunny had no time to rest as Dawn's mate was still a victim of Parasimon.
"Dad, why did you leave...? Was it because of me...?" Ash then asked in a saddened and still mindless tone, before the tentacles fired another blast of light crimson energy at Lopunny, who jumped back, before the Rabbit Pokémon looked down, as she watched as Pikachu slowly opened his eyes, only to be greeted by the vision of the beautiful Lopunny.
But it was then Dawn called out, hoping to reach out to Ash. "Ash, please listen. Whatever reason your father left wasn't because of you. And even without your dad there for you, there are still people and in your life who love you like me. I love you, Ash!"
But it seemed Dawn's plea to free Ash from Parasimon was for nothing as Ash began to command. "Pikachu use... Use..."
However, everyone, including Parasimon could see Ash was struggling to break free as Dawn's words had reached his heart, in which Ash then commanded in an emotional tone. "Thunderbolt...! Use Thunderbolt on me...!"
"What!?" Parasimon questioned, before he stated. "I didn't order that!"
Not wanting to see Ash harmed, but after hearing the desperation in his tone, yellow sparks appeared around Pikachu's cheeks, before he then unleashed a powerful bolt of electricity from his cheeks right at Ash, who cried out in pain, as he was engulfed in yellow lightning, which then traveled down Parasimon's tentacle, and before Parasimon knew what happened, it too was engulfed in yellow lightning and shocked beyond comprehension.
It was after Pikachu had ceased his attack that he, Dawn and Lopunny could see Ash was free from Parasimon's control, as Parasimon's body digitized and faded into nothingness, as Ash lay unconscious on the floor, in which Dawn made her way over to the black haired teen, rested his head on her lap and smiled as she watched as he slowly opened his eyes.
"See, I told you it wouldn't be the last time I'd get hit by an electrical attack." Ash then said, as he smiled at Dawn, who smiled back, before she lowered her head and gently kissed Ash on the lips.
However, Ash and Dawn were interrupted when Pikachu let out a concerned 'Pika Pika', in which they broke from their kiss to see Pikachu pointing at the roof, in which Delia, Mimey and Professor Oak were stunned to see an entire battalion of Parasimon hanging from the roof, however, neither Pokémon Trainer seemed fazed by the surprise attack.
Ash and Dawn then nodded their heads, before they both exclaimed. "Pikachu, Lopunny. Use Flash Freeze!"
It was then Lopunny unleashed a large light blue beam out of her mouth, as Pikachu unleashed another powerful bolt of electricity from his cheeks, which traveled up Lopunny's Ice Beam attack.
Delia, Mimey and Professor Oak watched in amazement as Lopunny's Ice beam froze the entire roof and every single Parasimon, before Pikachu's Thunderbolt surged through the ice, and moments later, all the ice and frozen Parasimon shattered in a massive explosion, before small flakes of ice gently rained down upon the Pokémon and their Pokémon Trainers.
But it was then, before Ash, Dawn, Pikachu or Lopunny knew what happened, they were all enveloped by dark red energy and left the arena.