Here I am with another chapter. All I'm going to say is that canon is going to verge off course here.
Disclaimer: Own nothing, yada yada, This is the last disclaimer you'll see.
Archer blocked the green sword with his married swords, flinching at the strength of the familiar.
'No, Pokemon. Because why the hell not.' The owl raised the sword and began an overhead slashat Archer, and said Servant was deflecting the blade that was untraceable.
"Use Aerial Ace to break his guard!"
Another shout from Caster caused Archer to glance at the Servant before feeling a hot pain on his stomach. Grunting, he reprimanded himself for looking away and jumped backwards.
The owl, Decidueye, rested itself in front of Caster, tense and ready for another confrontation.
Glares were exchanged, and before any servant could make a move they were interrupted with a crash.
"Archer! What are you doing?" Rin had arrived, scowling at her disrespectful servant.
She looked around the room until she locked eyes with Shirou. "Emiya?"
Shirou gave a weak smiled and scratched the back of his neck "Tohsaka, good evening. I'd make some tea, but…" Shirou gave a wave to Archer, the servant still tense and ready for action.
Rin gave a surprised look at Shirou before frowning. "You, Emiya, the brownie at Homurahara, are a Master?"
"Ah, seems so. But it's more of a surprise to see Tohsaka as a Master. Are you a Magus too?"
"Wait, you know about the moonlit world?!"
"Yes?"
"As Second Owner Emiya-kun, I should have the knowledge of all magi taking residence at Fuyuki."
"But didn't my dad just live here?"
"You're dad-wait Emiya, you're the son of the Magus Killer!?"
"Wait, what?"
As the two conversed, Archer and Caster began a truce of sorts.
"If you take back your bird, I'll disarm myself." Archer negotiated.
Caster shook his head. "So you can summon your swords immediately after I return Decidueye. Sorry, but that prospect doesn't really appeal to me."
Taking off his blue jacket and white hat and sitting down, Caster motioned for his pokemon to stand next to him.
"..." Decidueye glided to his trainer, impassively looking at Archer.
'This cannot be happening.' Archer thought as he dismissed his swords. Shaking his head, he looked at his Master and saw that Rin was roughly interrogating his younger self.
"Aren't you going to protect your Master from mine?" Leaning on the nearby wall, Archer asked.
Caster just grinned and shook his head.
"Nah, this is more fun. Don't worry, Decidueye here can easily take her out if needed."
The owl pokemon took a feather from its wing and started spinning it using its...feathers.
'Pokemon, nothing makes sense with them.'
Archer still eyed the feather, and the Pokemon too was sizing him up.
"Ha." Rin sighed loudly as she looked pitifully at Shirou.
"At least I know the identity of a Master. This war is at least slightly easier."
Composing herself, Rin bored her eyes into Shirou and began explaining.
"Since I am benevolent enough, I will ask for an alliance just for tonight Emiya. You need to get to the church to confirm your status with the proctor."
Shirou glumly sighed and began preparing to walk to the door.
"Archer, at my side." Rin ordered to her Servant.
"Yes my Master." Getting off the wall, he dematerialized.
Shirou looked in wonder before shaking his head at the craziness of tonight.
"Caster, lets go."
"Gotcha Master." Walking up to his Master, Caster stood by Shirou's side.
"Can you…?" Shirou began asking while gesturing to Rin.
"Dematerialize? I can, but not when I have Pokemon out." Castered lectured.
"Figures."
While the two Masters began trekking to the Kotomine church, a pair were watching them with a familiar.
"Watch yourself Onii-chan." Illyasviel smiled. "Not all Masters are benevolent."
Giggling, Illya looked at the Servant at her side. "Berserker, let's go."
The hulking presence picked up his Master and cradled her before jumping off to the distance.
As the group trekked to the church in silence, Shirou was thinking about Caster's previous words about the war.
'A wish? I wonder what Tohsaka's wish is. And what about Caster?'
As Shirou was thinking, Caster and Decidueye were scanning their surroundings as they walked slightly behind Shirou. Caster was thumbing his bracelet as Decidueye was slowly flying at the group's walking speed.
Unbeknownst to the the pair, Tohsaka Rin was thinking the same thoughts about Shirou.
'What is the Fake Janitor's wish? Why? Was he too prepared about this War and taught by his father?' Rin shuddered at the thought of having the Magus Killer's son as an enemy.
'Was he fooling everyone at the school, trying to seem like he was just another student to ward off suspicion?'
Hearing his Master's thought, Archer sighed quietly.
Nearing the church, the group was surprised to see a white haired girl in front of the walkway to the church.
"Nice to see you again Onii-chan." At this sentence the air around her decreased in temperature.
"...A little girl is the proctor to this war?" Shirou asked Rin in puzzlement.
Rin, however, had widened her eyes in surprise.
"Archer, get to position! Shirou, tell your Servant to do something! We're fighting another Master!"
"So you know Tohsaka Rin. However, this won't help you. Berserker, kill them for me please~" Illya asked politely.
Astralizing, the mass of muscle appeared that was Berserker appeared, bronze skin shining as he held his axe-club.
"GRAAAAHHH!"
An inhuman roar echoed throughout the area, and this signaled the start of Berserker's blitz to Shirou.
"Caster!" Shirou yelled in distress.
"My gosh, I mean, Decidueye, Spirit Shackle!" Escaping from his stupor, Caster began ordering his Pokemon.
"Hoo!" Bow ready, Decidueye quickly launched the arrow wreathed in darkness to Berserker.
"ROOOAAHHH!"
The arrow was launched, yet as the hulking Servant tried to intercept the arrow with the axe-sword, it phased through, sticking itself into its chest.
"It's a Fighting type! Use Aerial-"
Caster was interrupted as Berserker slammed his weapon to the ground, creating a shockwave that blasted the group away.
"EYE!" Beginning to fly, Decidueye's body began to glow brightly before launching towards the Servant.
Covering himself with his arms, Shirou bowed his as he began to reinforce himself.
'Trace on!' While his Servant's familiar was holding off the other Servant, he would be able to save Rin and-
"Where are you going Onii-chan?"
Shirou lifted his head and locked eyes on the white-haired child.
"You looked like you were trying to escape~" Eyes closed and smiling, the Einzbern gave an order that chilled Shirou to the bone.
"Berserker, kill them all first, then end my dear brother."
Shirou looked at the battle, and saw horror.
Berserker had the owl in its grasp and Rin in the other.
"Let me go Einzbern!" Rin shouted as she struggled, even as her arms were free.
"Eye!" Decidueye too was struggling, but Berserker's grasp was too tight.
"No." Shirou looked to Caster a few feet away to see him glaring.
"Not again." Standing up, Caster took out two Pokeballs.
"Decidueye, return!"
A red beam shot to the Pokemon, who turned red and disappeared from Berserker's hand.
At the same time the Pokemon was returned, Caster sent out another.
"Go, Swampert!"
The blue fish Pokemon materialized, and began glowing purple as Caster pressed his fingers to his bracelet.
"Prepare to use your Noble Phantasm Swampert!"
"Swamp!"
"Berserker! Quickly kill her-!" Illya shouted before the arrow that was embedded in Berserker's chest was pulled by Rin.
"GRAAAAA!" The hulking Servant let go Rin in the split second of weakness, allowing the Tohsaka to run away.
"Now Archer!"
Miles away, the red Servant smiled as he observed Emiya Shirou.
"As you wish, Master."
Prana cloaked the Servant as he readied a weapon that was not Caladbolg, but another Phantasm entirely.
Altering it to become an arrow, Archer transferred more prana to the weapon, just enough until it Broke.
Nocking it, he chanted only one line. Just enough to make sure to end his Hell for good.
"I am the Bone of my Sword…
Gae Bolg!"
"Give me your strength Swampert and use your Noble Phantasm! Mega Evolve!"