Finished Pokemon Sun, and might I say that that was awesome, 10/10 would play again. Now, for the hype that is Heaven's Feel that's coming out this year, I'm writing this, and this isn't a one shot. Updates will be slow however, as that is life. Don't need disclaimer really, as I am neither Miyomoto nor Nasu.

In a familiar backyard, it was late evening, where a familiar blue spandex-wearing servant was chasing Emiya Shirou. However, a not so familiar figure was summoned in Shirou's need.

"Ya know, I've seen a lot of things in my time, but what the fuck is this thing?!" Lancer yelled out in indignation as he tried feverously to take back the spear head that was currently in the hands of an anthropomorphic blue fish.

"Swamp?" The blue fish tilted his head before head butting Lancer, causing the Irishman to stumble back.

"Gah!"

"Wh-what's going on?" Emiya Shirou was sitting on the floor of his shed in astonishment as he stared at the kid in front of him.

The kid turned back, his red scarf fluttering to the wind.

"The name's Caster, are you my Master?"

'….'

"Master-?"

"Die you fish!" Lancer was thrusting the spear at the blue fish, who was blocking the spearhead with its arms.

"Swamp!" Lancer was slapped, causing him to tumble to the Emiya household. Part of the roof collapsed onto the spot where Lancer landed, and a pained moan was heard in the rubble.

"Good job Swampert!" The kid that was named Caster ran out the shed and started scratching Swampert on the chin.

"Swamp." The blue fish crooned, leaving Shirou to stare in confusion at the mess that was his home.

"What just happened? Who are you?" Shirou asked, wondering why this was even happening to him.

"Hm?" Caster stopped scratching the blue fish, which was now dubbed Swampert, and looked at Shirou.

"Well, you summoned me as Servant Caster." At this he smiled widely. "Don't worry Master, with my help, you'll easily win this war!"

"That's not what I meant…"

On cue, Lancer exploded out of the rubble, panting as his veins on his forehead were seen.

"Caster! This is your familiar?" Lancer all but shouted at the kid while pointing with the red spear at Swampert, who was on his back.

"Yes." Caster smiled. "Isn't he cute?" Swampert rolled onto his feet and walked up to his trainer, licking his face at the praise.

Lancer's eye twitched, and in his mind he can hear Kotomine saying to retreat back to the church.

Inhaling, Lancer glared at the Servant, before locking eyes at the red haired kid he was already trying to kill.

"I will not leave you bastard, until I see some blood!" Jumping onto the intact part of the roof, Lancer prepared his Noble Phantasm.

Shirou's eyes widened as he saw the blue man prepared to throw the spear, which was exuding a visible aura of bloodlust.

In his mind, he can only do one thing. In the same moment, the blood red spear finished powering up and Caster sharpened his eyes.

"Trace, On-!"

"Swampert, use Protect!"

"Gae Bolg!"

The spear was thrown, but what stopped it was a green barrier that covered both Servant and Master.

"Hold it Swampert!"

"Swamp-!" Swampert was holding the barrier with all its might, giving pained grunts as the spear inched slowly closer against the barrier.

"You got this boy! Master, any plans?" Caster asked urgently as he thumbed at his bracelet.

"What? No! I-!" Before Shirou could say anything, the spear stopped exuding a deadly aura and zig zagged back to Lancer.
"Kotomine, you bastard…!" In pain, Lancer caught the spear and jumped across the roof, ignoring the three.

"I think we won. Good job Swampert!" Caster hugged the tired Pokemon, who let down the barrier in exhaustion.

"Swamp." Swampert closed its eyes before being engulfed in a red light.

"You did well." Pocketing the pokeball. Caster looked at his Master, who was dumbfounded.

"So, how was that? Pretty good right?"

Shirou had no idea what he got himself into, and Caster's comment finally broke him.

"What is happening?! Who are you, what was that thing, and why did that guy in blue try to kill me!?"

Caster frowned at the questioning. "Wait, you accidently summoned me?"

"Yes?" Shirou retorted.

"Huh, well why don't we go inside your house and discuss what's going on?"

At this, a large crash was heard as part of the walls of the Emiya residence crumbled.

"...You can fix that, right Master?"

Shirou sighed in exasperation.
-

"You felt that, didn't you Archer?" Rin asked the invisible servant as she observed the residence in front of her.

"Master, everyone with an ounce of prana felt that." Archer materialized himself next to Rin. Preparing for the inevitable arrival of Saber, he created the married swords and waited.

"...Archer, what are you doing?" Archer ignored his master as he felt the presence of another Servant.

'Where's Saber? She should arrive by now, aiming to kill, yet there's no movement.'

"Archer!"

"Excuse me Master, but there's another Servant in the area." At this Archer jumped over the wall separating the street and Emiya residence.

"What are you doing!?" Rin too jumped across the wall, following her Servant.
-

"...which is why you have six other trainers with one Servant aiming to kill each other, But, you have me and six others, so you'll be the one to win!"

"A wish? Can such a thing be possible?" Shirou pondered on the mini lecture Caster gave.

Caster nodded before freezing. "Get down!" Jumping, he pushed Shirou down on the ground and began rolling just as Archer slashed at the space where Shirou was.

'Hmph, that explains why Saber is missing.' Looking at the kid that was the Servant, Archer gave a smirk.

"You alright Master?" Caster asked in concern.

Picking himself and the Servant, he confirmed his safety, "Yeah, I'm fine."

Shirou glared at the red intruder before grabbing a nearby broom.

'Trace On.' Shirou held the broom in a kendo stance, the broom was reinforced to its limit.

However, Caster put a hand up, the other reaching into his belt.

"Are you even a hero, boy? Looks like your Master messed up the summoning." Archer remarked before entering a stance.

Bringing out a pokeball, Caster grinned. "You're right. He did mess up. I'm no Hero."

Throwing the pokeball above him, the ball opened to reveal a green and brown owl.

"I am a Champion! Decidueye, Leaf Blade!"
-

Class: Caster

Master: Emiya Shirou

True Name: ?

Alignment: Neutral Good

Gender: Male

Stats-

Strength: E

Endurance: E

Mana: C

Agility: D

Luck: C+

Class Skills-

Territory Creation (D)

As the ability to create a field suited for the Servant, Caster can recreate the battlefields he has battled on by altering the weather to suit his needs.

Item Creation (E+)

Caster can create items suited for battle, such as Max Potions and Battle Items, but is unable to create Revives.

Personal Skills-

Eye of the Mind (True) (B)

Having experienced hundreds of battles, especially during his time as a Champion, Caster can observe situations that might happen and act accordingly moments before it happens.

Battle Continuation (A)

With the mentality of never running away from Trainer battles, Caster will continue to battle until he is fully beaten and unable to continue his battle for the Holy Grail.

Pokemon Summoning (B)

As a Champion, Caster hold six Pokemon at all times, but can only summon the number needed when facing opposing one or multiple Servants.

Noble Phantasms

The Pokemon League-E

Type: Support

A Reality Marble that recreates the Champion room Caster was well known for, which allows his Pokemon to get one Rank Up in all stats.

?-A

Type: Support

Caster can summon ******* if almost all Pokemon are unable to battle. At the end of each journey, Caster has always captured a *********, and can get its support when in danger of losing a battle.

Pokemon:

Swampert

Gender: Male

Alignment: Neutral

Stats-

Strength: B

Endurance: B

Agility: E

Mana: D

Luck: N/A

Noble Phantasm-B

? ?

Type- Self

Allows Swampert to get a Rank Up in all stats when he is ? ?.