A/N: This fanfiction will feature no shippings whatsoever, although there are a few hints at a harem for Ash. Also, later on this fanfiction might be renamed to 'Unstoppable Battle Bond', cos I'm thinking of featuring some of Ash's other Pokemon that have the Bond Phenomenon, such as Charizard, Infernape etc. Who knows, maybe I'll even come up with Ash-Solgaleo. Or Ash-Arceus. Or Ultra Ash-Necrozma. Hehehe. Tell me what you guys think!
An hour after the match with Diantha, Ash once again stood in front of the roaring crowd, facing his longtime friend and rival, Gary Oak across the field. "So, Ashy-boy, you've finally decided to show up after six years. I must admit, your Greninja was really something. How' bout pitting it against one of my Mega Evolutions?" Gary smirked, holding out his Mega Ring which held a keystone. Ash smiled in response.
"How bout we do something even more exciting Gary? I know for a fact that you have three Pokemon that can mega evolve. So, how about you use all three against me?" Ash then turned to the crowd. "I will use Greninja and only Greninja in three 1-1 battles against all of Gary's mega-evolved Pokemon. If I lose to even one of them, even if I win against the other two, it will be counted as a defeat. Fair?" The crowd roared in assent.
"You think Ash can make it?" asked Mallow with a frightened expression. "It's alright. The bond between Ash and Greninja will overcome the odds. They'll win for sure!" Serena said confidently, never taking her eyes off Ash. "That's right. We must have faith in Ash!" Lillie agreed.
"Scizor, let's go!" Gary threw out his pokeball, and his Scizor struck a battle pose as it appeared. Across the field, Ash had let out Greninja, who had folded his arms and stared down at Scizor. "Scizor, mega evolve!" Gary pressed his keystone, which let off tendrils of light that connected with the mega stone on Scizor's neck… (I'm pretty sure you all can imagine what mega evolution looks like if you watch the anime so I'm just gonna skip the description) Scizor became Mega Scizor.
Ash smirked. Gary's probably thinking he's got a chance at winning cos of the type advantage. Well… "Greninja, let's do this! STRONGER!" The familiar raging torrent of water surrounded Greninja, filling him with transforming power. The veil of water subsided, splitting into the giant water shuriken on his back.
"HERE WE HAVE IT FOLKS! ASH-GRENINJA VS. MEGA SCIZOR! WHO WILL EMERGE THE VICTOR?" The commentator announced.
"Let's do this! X-Scissor!" Gary commanded. Mega Scizor's claws became enveloped in a blue light, imbued with pure bug-type energy, before charging at Ash-Greninja.
"Respond with Aerial Ace!" Greninja charged forward as well, its arms and legs glowing white with flying-type energy. The two Pokemon met in the middle of the field, clashing fiercely in a brawl. However, Greninja proved to be the stronger, as it swiftly landed a punch on Scizor's face and sent it reeling back in pain and skidding across the field. Scizor shook its head, trying to clear the pain, but Greninja didn't give it time to recover. Streaking across the battlefield at such high speeds that could only be matched by ordinary pokemon using Extreme Speed, Greninja landed a solid uppercut on Scizor, sending it flying into the air, before it crashed its glowing foot down on the hapless bug-type. With a painful screech, Scizor was sent sprawling in front of Gary.
"Scizor?! Are you alright?" Gary inquired in concern. With a groan, Scizor stood up breathing heavily. Greninja eyed it from the other side, looking as cool as a cucumber. "Alright, it's payback time! Use Thunderbolt!" Scizor gathered a yellow sphere of electricity between its claws before shooting a huge bolt of electric energy at Greninja. The bolt connected with Greninja with a loud 'BANG'. "Yes!" Gary clenched his fist, satisfied that he had gotten in a direct hit. However, the dust cleared, revealing Greninja with barely a scratch on him. "We didn't even feel a thing!" Ash laughed.
Gary, and the entire crowd, were shocked. "B-b-but how…?"
"Training, training, and more training." Ash said. "We've taken like 10,000 plus electric, grass, fighting, bug and fairy type moves in the last six years, so I think we're pretty much immune to them by now." He shrugged casually as if it were no big deal.
Gary gritted his teeth. "Scizor, X-Scissor!"
'Greninja, use Samurai Blades.' Ash spoke in Greninja's head through telepathy. Their bond had progressed to the point where they were able to hear each other's thoughts while in sync. All that appeared to the crowd was Greninja and Ash making eye contact, and a simple nod was shared between them.
The nect thing the crowd saw, Greninja charged at Scizor, a pair of insanely long and wickedly sharp Katana Swords of pure, fighting-type aura energy in its hands. The swords met the bug-type move, easily parrying Scizor's metallic glowing claws before one of the katanas swiftly struck Scizor square in the chest. Scizor howled in agony as it was sent flying into the air by the force of that blow. "Kou…gaaa!" Greninja leapt into the air after it. Time seemed to pass in slow motion as Greninja got above Scizor and raised both swords for the finishing blow.
The crowd gasped as Greninja landed both his katanas, a brutal merciless cross slash that winded Scizor and smashed him into the ground. The dust cleared soon after, revealing an unconscious Scizor lying in a huge smoking crater.
"Scizor is unable to battle. Greninja wins!" The crowd cheered frantically.
Gary returned Scizor to his pokeball, thanking him for his hard work. His face turned serious as he threw out his next choice. "Go for it, Electivire!"
His Electivire appeared in front of Ash-Greninja, a mega stone wrapped around his left arm. Gary pressed his keystone once more, and bright light enveloped Electivire, transforming him into Mega Electivire. (There's a picture online, go search for it.)
"Alright, Electivire. Thunder full power!" Mega Electivire screamed as it let loose an absolutely massive and ferocious bolt of electric energy towards Greninja, and the ninja frog became drenched completely in the electrical attack. However, Greninja just stood there casually, his arms folded even in the midst of being engulfed in electricity. It looked as though it didn't have a care in the world. Gary gave the command to stop when he realized that Thunder wasn't going to do anything.
"Smart choice, Gary." Ash said. "Night Slash, let's go!"
"Electivire, fight back with Cross Chop!" Greninja drew the pair of long purple blades and met Electivire's glowing palms, sparks flying from their clash. It might look as though Electivire had the advantage in size and power, but to the audience's surprise, Greninja was actually pushing Electivire back. It wasn't long before the two pokemon drew back and Greninja lashed out swiftly, slashing Electivire across the chest and landing a critical hit.
'Let's stop messing around. NIGHT SLASH! AERIAL ACE! WATER PLEDGE!"
Ash spoke all of these through telepathy, so no one heard him. All it seemed to them was just a mutual nod between the two and…all hell broke loose.
Electivire had just shaken off the pain of that critical hit before Greninja hewed and slammed the two Swords of dark purple into its torso, causing yet more wounds of burning agony. The swords disappeared, only to be immediately replaced with rapid punches and kicks that had enough raw power to nearly knock out the thunderbolt pokemon, despite not being very effective. And just when Electivire had just about enough, Greninja struck the ground, sending up massive pillars of water that slammed into Electivire, and sent it crashing into the ground painfully.
"ELECTIVIRE!" Gary screamed in fear. The steam from the water cleared, revealing Electivire lying on the ground, very much knocked out. The referee once again made his call, and the crowd cheered ecstatically again. Serena, May, Dawn, Lillie and Mallow were squealing with joy. Paul looked ready to pass out from fear, while Alain merely watched with his jaw agape.
Gary recalled his Electivire, before taking out his final pokeball. "Go, Blastoise, I'm counting on you!" The imposing water-type starter stood towering over Greninja, but the ninja frog didn't seem fazed. Gary then evolved Blastoise into Mega Blastoise.
"Focus Blast!" Blastoise gathered a large ball of gold fighting-type energy in its mouth and launched it at Ash-Greninja, which to nobody's surprise had no effect at all. Ash sighed. This was getting boring. "Honestly, Gare-bear, don't you ever learn?"
The crowd howled with laughter at Ash's nickname for Gary. Gary would have laughed along as well, were he in a less desperate situation. "Skull Bash!"
"SAMURAI BLADES!" Greninja unsheathed its two long Katanas, dashing forward to collide with Blastoise who was rushing at full speed with its body covered in a white outline. There was an explosion as the moves collided halfway in the battlefield, before a cloud of dust kicked up. People squinted to see what was happening in the dust cloud, but Ash, sharing his senses with Greninja could see perfectly well what was happening. Blastoise cried out in pain and Greninja bombarded his shell body with furious, relentless slashes and blows with Samurai Blades. A final cross slash sent Blastoise flying backwards, crashing in front of Gary facing up.
"Ah! Blastoise!" Gary shouted in alarm. Blastoise struggled to his feet, his body covered with injuries and bruises. On the other side, Greninja flexed his muscles, and the Water Shuriken on his back suddenly doubled in size. With a graceful leap Greninja shot up into the air, using the shuriken as a glider to stay airborne.
"It's time we ended this! Greninja…" Ash said.
"WATER SHURIKEN SUPER ULTIMATE!" The most massive, biggest whirlpool seen yet surrounded Greninja as he lifted the Water Shuriken above his head; the water swirled and churned furiously before coverging into the shuriken. The next thing everyone saw was the famous Ash-Greninja, hovering in the air, with a colossal, hyper-massive shimmering blue Water Shuriken discus spinning like a buzzsaw above his head. It was easily over 10 times the size of the typical Fuma Shuriken.
"Blastoise, Hydro Cannon full power!" Blastoise gathered all of his energy and fired off three gigantic blasts of water from the three cannons on its body. "LET IT RIP!" Ash bellowed and with a bloodcurdling battle cry Greninja hurled down the still spinning ultra-sized bluebell Water Shuriken discus. The Hydro Cannon intercepted the Water Shuriken, but instead the giant throwing star absorbed the water-type Hyper Beam growing even larger and all the more powerful. Blastoise could only watch on, paralysed with fear as the shuriken slammed down full force into it.
The explosion of water was so great that it literally shook the entire stadium to its core. The crowd gasped as droplets of water sprayed onto them. Eventually the steam cleared, and everyone gaped at what they saw. Blastoise had reverted back to his original form, lying unconscious in a steaming crater that covered the entire battlefield. No one spoke, they were shocked to. Finally, the referee recovered and remembered his duty.
"Blastoise in unable to battle. Greninja wins! Which means ASH IS THE WINNER!"
The crowd went wild, cheering for the spectacular battles and the sheer display of power that Ash-Greninja had displayed. Ash heaved a sigh of relief, as Greninja reverted to his base form. No words were spoken between the two, but a simple mutual nod and a high-five from the two spoke all there was needed to speak between them.
In this fanfic, Greninja has unrestricted access to his entire moveset and is not limited to using only four moves. In his Ash-Greninja form he is powerful enough to match even mega-evolved Mewtwo and other legendary pokemon, with considerably increased defenses and unmatched speed. Water Shuriken remains his primary water-type move, though now he knows others like Water Pulse, Water Pledge, Hydro Pump and Hydro Cannon. Extreme Speed and Double Team are his staple normal-type moves for boosted speed and versatility, and Aerial Ace is his favorite for unarmed melee combat, and is very useful against fighting, grass and bug types. Night Slash is Greninja's main dark-type move though he also knows Feint Attack, Dark Pulse and Sucker Punch. He also knows fighting type moves such as the newly invented Samurai Blades, as well as Low Kick, Aura Sphere and Close Combat. Cut, Samurai Blades as well as Night Slash are all used by Greninja for close-range armed combat; Greninja also knows a variety of ice-type moves like Ice Beam, Ice Punch and Blizzard, and is able to use his ice powers to create long katana blades of ice, or freeze his Water Shurikens to form Ice Shurikens. Lastly, the Battle Bond he shares with Ash enables him to create incredibly, mind-blowingly massive and powerful Giant Water Shurikens with absolute knock-out power.