A/N: Just to let you all know, this is what my thought on how SSBM turns out. Please, don't take it seriously.
Chapter 6: Pikachu's temptation
Super Smash Bros Melee timeline
"Why are you're doing this, Mewtwo?" Jigglypuff questioned as she and a different Pikachu faced off against Melee Mewtwo, within the Melee's Pokémon Stadium.
"Why are you teaming up with Bowser and Ganondorf?" She then asked.
"Humanity disgusts me. I need power so I can wipe humanity out once and for all. And all who stands in my way will be eliminated, even if it means you!" Melee Mewtwo replied vengefully.
"I cannot believe you think that way." Melee Pikachu said, disgusted, before he stated. "Then we will stop you and if I die, someone else will take my place to stop you!"
"Fine. I'll kill you both." Melee Mewtwo said in reply as he, Melee Pikachu and Jigglypuff leapt in the air and begun their fight to determine whether Melee Mewtwo would be successful in his plans.
-Hours later-
A Pichu was running through the rain, looking for his dear friends, but then came to a halt and was shocked to see Jigglypuff, still alive, groaning, trying to get up, however, Melee Pikachu was lying in a puddle, dead.
Pichu's tears flowed through his eyes and down his cheeks, causing Jigglypuff to face the Pichu and say in a weak tone. "I'm sorry, Pichu. Pikachu... he fought hard. But Mewtwo..."
"No, it can't be...!" Pichu said, refusing to believe what Jigglypuff was trying to tell him, to which he rushed to Melee Pikachu, still crying.
"Big brother… Big brother…! BIG BROOOTTTHHHHHHEEERRRRR!"
As he screamed, Pichu began to power up, and through his despair, he Evolved into the Pikachu the Brawl and Wii U Smash versions used to this day.
-Present-
Pikachu just stood in silence as he finished the scroll, saddened that those dark days came back to haunt him.
"Pikachu..." Lucario asked softly as she, Charizard, Yoshi, Kirby and Greninja approach him. "Are you alright?"
"Oh, hey guys..." Pikachu replied silently, causing a silence to fill the area, before Yoshi saw the scroll and understood.
"Oh... that time huh?" Yoshi asked, not wanting to be intrusive, but was concerned for Pikachu, who just nodded in reply to the question.
"What's wrong?" Charizard asked.
"That scroll, it contains one of our previous tournaments adventures. The Pikachu you see before us, is the Pichu who took part in it along with his beloved big brother, the Pikachu who fought in the first and second tournament." Kirby explained.
"But in that time was the formation of Bowser, Ganondorf and Mewtwo, the evil alliance. They sabotaged the tournament. The older Pikachu knocked Pichu out and he and Jigglypuff went off to stop Mewtwo all by himself while Mario and a different Link faces Bowser and Ganondorf. But it ends in a tragedy as Pikachu dies fighting Mewtwo." Kirby then said sadly. "Pichu was so depressed he Evolved into the Pikachu you see before us today. He defeated Mewtwo to protect his world and finish what his brother had started, thus making them arch enemies".
"That is why Mewtwo was not in the Brawl tournament right?" Shulk asked suddenly as he, Link and Mario appeared before them, making all but Pikachu face them, who said in reply. "Yeah, that's correct."
Hearing that Pikachu had gone through such a horrible ordeal, Lucario felt a great pain in her heart, empathy towards Pikachu as she said. "Pikachu, I had no idea. I'm so sorry."
"Mewtwo... what he did is unforgivable" Greninja stated, wishing nothing more than to give Pikachu the justice he deserved.
However, the scroll unleashed a dark aura, shocking everyone.
"No! Not this history too! We've gotta act fast!" Pikachu gasped.
"Pikachu, hold it." Future Rosalina told him as she appeared, before she told him. "You understand don't you? You cannot go, otherwise..."
Pikachu snarled as he wanted to do something, but then fell silent, worrying Lucario, Charizard and Greninja.
"Yoshi, Kirby, I trust you two to go and stop this." Future Rosalina told them.
"And please, do your best." She added.
"Got it." Yoshi said in reply as he and Kirby then held the scroll and entered the timeline.
-Super Smash Bros Melee timeline-
The Melee Pikachu and Jigglypuff were facing off against Wario and Waluigi, surprised by their appearance.
"Who are they? Ugly versions of Mario and Luigi?" Jigglypuff asked.
Suddenly, Yoshi and Kirby appeared before them, which confused and stunned the Melee fighters more.
"Yoshi? Kirby? What are you two doing here?" Melee Pikachu asked in surprise, part of him thinking it was another tournament.
"Wahaha. Look who's here. Little Yoshi and Kirby. This is perfect." Waluigi said.
"Yeah. Once we are rid of you two, then these runts will fall like flies." Wario added.
"I don't think so!" Yoshi said as he used his Egg Roll attack and slammed Wario in the stomach.
With a shot to the gut, Kirby used his time to attack Waluigi, where he used his final cutter attack, knocking Waluigi back, which still left Melee Pikachu and Jigglypuff confused as to what was happening, but the pair decided it was best they fight and get their answers later, with Jigglypuff joining Kirby, while Melee Pikachu joined Yoshi.
"So what are you guys doing here? I thought you guys are helping Mario and the others stop Bowser and Ganondorf." Melee Pikachu asked as he used his Thunder attack, causing a massive burst of electricity to shoot down from the sky at Wario, who dodged the attack, but was then ambushed as Yoshi kicked him afterwards.
"We're not the Kirby and Yoshi you know. You might not understand." Yoshi replied.
{You two, you have to protect Pikachu and Jigglypuff! Defeat Wario and Waluigi for good this time!} Shulk told them.
"You've got it" Kirby said as he sucked up Waluigi and then spat him right out, to Jigglypuff who slammed her body into him.
As Kirby and Jigglypuff continued to attack Waluigi, with Kirby absorbing his power and gaining a purple cap in the process, Wario used his Bite move on Yoshi and chomped on him, only to be let him go after Melee Pikachu skull bashed him in the back.
"Gah, you little pests know how to make me mad!" Wario snarled as he took out a clove of Garlic.
Waluigi then took his tennis racket and whacked Jigglypuff in the face, making her fly back a bit, but Kirby, now with his power, slammed Waluigi into the ground with a powerful stomp of his foot and then used his own Waluigi tennis racket to pummel the purple clad villain.
Back with Wario, he was about to eat the garlic to become Warioman and devastate his enemies with his increased speed and strength, however, Yoshi slapped the garlic out of Wario's hand with his tongue.
"I am not letting you become Warioman!" Yoshi stated, ignoring the terrible taste now in his mouth as he then leapt into the air and used his butt slam on Wario, making him yell out in agony.
While Yoshi had stopped Wario from unleashing his great power, Waluigi had broken free from the ground and engaged Kirby in close combat, where racket met racket in a similar style to sword fighting or fencing.
But knowing this wasn't the Olympics and that the best way to win was to use ome tricks, Kirby then discarded the power of Waluigi, held up his hammer and slammed it into Waluigi, who was knocked back and crashed into Wario, before both collided and fell to the ground, defeated.
With the battle over, Melee Pikachu walked up to Yoshi and Kirby, looking suspicious.
"You two… are different from when I remembered you. You two look better designed and you fight better. So where did you guys come from?" He asked.
"About that..." Yoshi was about to answer when Kirby looked up and shouted. "Look!"
Mewtwo appeared in the sky and landed before them, where he looked down at the defeated Wario and Waluigi in disgust.
"I knew they don't have what it takes to beat you." He commented.
Seeing this Mewtwo, who wore black gloves and black jacket, Yoshi and Kirby knew that this was their own Mewtwo, not the Melee Mewtwo, but also knew he was still as dangerous as any Mewtwo.
"Mewtwo!" Yoshi and Kirby snarled, while Melee Pikachu and Jigglypuff were surprised.
Mewtwo turned his attention to Melee Pikachu.
"The past Pikachu, always full of hidden potential aren't you? Killing you again would give me great enjoyment." He said.
"Mewtwo? No... something different about you." Melee Pikachu said, before commenting. "You're not suppose to be that strong."
{Uh oh. Mewtwo's here. The Melee Pikachu will be no match for him, even after his battle with Wario and Waluigi} Link spoke up.
Yoshi and Kirby ran up to attack him, to which Mewtwo ducked under Kirby's kick and Yoshi's tail whack, ignoring the riff raff and headed towards Melee Pikachu, where the Psychic-type slammed a Shadow Ball into Melee Pikachu's chest and sent him flying in the air.
And with Melee Pikachu starting to fall, Mewtwo appeared behind him, ready to finish him off.
"I'll put you out of your misery now!" Mewtwo announced.
"Oh no! Pikachu!" Kirby gasped.
{Big Brother! DAMN IT! I'm going in!} Pikachu yelled as he couldn't take it anymore.
{Pikachu, Lucario and I will go with you!} Charizard said, following Pikachu, while Mario called out. {H... hey!}
{What are you three doing? Stop it!} Future Rosalina yelled.
"What's going on over there?" Yoshi asked in his communicator., but it didn't take him long to get an answer.
As Mewtwo prepared to kill Melee Pikachu, a Thunderbolt stuck him down, making him fly back, while Melee Pikachu was caught by Charizard's hands.
Annoyed, Mewtwo looked up to see who had interfered with his plans and saw Pikachu and Lucario glaring at him.
"You're not going to get your way today, Mewtwo!" Pikachu shouted angrily.
"Ahh, Pikachu. Or should I say Pichu?" Mewtwo asked, mocking Pikachu, while Melee Pikachu's eyes widened in shock as he heard what Mewtwo had said.
"Pichu? Little brother? What are you're doing here? I thought you..." Melee Pikachu questioned as Charizard let him down, but then he saw Pikachu and said, stunned. "But wait... that can't be. You Evolved. You...!"
"That's Pichu? But he's different." Jigglypuff said, just as confused.
"What are you're doing here, Pikachu?" Kirby called out, before telling him. "You heard Rosalina! You know you can't do this!"
"I know, and I am sorry but I can't... I can't abandon my big brother like this!" Pikachu said as he charged at Mewtwo as both head butted each other, creating a huge shockwave from the powers of lightning and darkness clashing against each other.
"Ugh, we forgot that you can be stubborn at times." Yoshi sighed as he, Kirby, Charizard, Lucario, Melee Pikachu and Jigglypuff all joined in the battle against Mewtwo, to which Lucario charged up her Aura Sphere to its limit and fired it at Mewtwo who was having a hard time fight seven at once.
Mewtwo snarled and took flight with his psychic power, while Charizard followed after him, grabbed him and used his Seismic Toss move, sending him flying back to the ground where Jigglypuff hit Mewtwo with her Rest attack.
Mewtwo staggered from Jigglypuff's move, maging to stay awake, just as Kirby kicked him in the back, which was followed up as Yoshi headbutted him in the front and both Pikachus used their Thunder attacks, to which the lightning combined into one massive bolt and struck Mewtwo down.
After being bombarded by such moves, Mewtwo slowly rose in anger.
"Why is it that I can't beat you? Even against all seven of you..." He snapped.
"I won't let you kill my big brother!" Pikachu interrupted in a determined tone.
"Tch. This isn't over. I will be back." Mewtwo stated, using his Teleport attack and disappeared, making a strategic retreat, which the heroes knew was just Mewtwo being a coward.
"Come back here!" Charizard ordered, but Lucario held him back.
"No, Charizard. Let him go for now." She said.
With the battle over, Jigglypuff and Melee Pikachu looked at Pikachu.
"Pichu, you... you came from the future didn't you? And you evolved into a new powerful version of me?" Melee Pikachu asked.
Pikachu just stayed silent, but felt his older brother's paw touch his shoulder to see him smiling.
"I'm really proud of you, little bro." He said, which caused Pikachu to smile and say. "Thank you."
"I am proud of you too, Pichu. But now it's not time for this. Our Mewtwo is still hurting humankind." Jigglypuff informed, making Melee Pikachu nod in understanding and turn as he prepared to head off.
But with this, Pikachu then thought of something. 'After that, my big brother will...'
He knew that his older brother will die trying to stop Mewtwo.
"Big brother! I'll go with you to fight!" Pikachu cried out.
"This time... this time... I won't hold you back!" He stated, continuing to cry.
{What are you saying?} Future Rosalina urged him not to interfere. {You know you aren't allowed to do that, Pikachu! If you help the other Pikachu here... You'll change the course of history!"
Pikachu was struck by this revelation, but wanted so badly to save his brother this time around.
"I... I know... but I..." Pikachu could only say.
"Pikachu..." Lucario said, gently placing her paw on his back, knowing it must be hard on Pikachu and wanted to make him happy, but she knew this fact too.
{Yoshi, Kirby, please, you must stop him!} Future Rosalina called to Kirby and Yoshi but the two already knew already.
"Little bro, is there something you want to tell me?" Melee Pikachu asked in a curious tone.
Giving him room to make his choice, Lucario removed her paw off of Pikachu and stepped back, wondering what Pikachu would do.
He was trying so hard to come up what to say, but Melee Pikachu looked at Charizard, Lucario, Yoshi and Kirby and then smiled.
"If you're here, all grown up then the Smash worlds are safe, isn't it?" Melee Pikachu asked, before he told Pikachu. "And so this fight has a real purpose. That's enough for me."
"I agree, Pikachu, spoken like a true warrior." Jigglypuff smiled.
Yoshi and Kirby nodded, knowing if Melee Pikachu died, then Pikachu would do what his brother had finished and would become a great fighter and a true hero.
"No! You can't, big brother!" Pikachu called out.
"Kirby, Yoshi, thank you for being a good friend to Pichu. You can't abandon good friends right?" Melee Pikachu told them.
"Yeah you're right. Take care, Pikachu." Kirby said in reply.
Melee Pikachu smiled as he and Jigglypuff turned to leave. "It's great to see you again, little brother."
"Big brother!" Pikachu cried out as he tried to stop him, but Yoshi jumped between the two Pikachus.
"Pikachu, this is how it supposed to go. I'm sorry but if you do this, we will stop you." Yoshi said.
Unable to do anything but watch, Pikachu saw Melee Pikachu and Jigglypuff then run off to their destination, breaking his heart, which Lucario could sense with her aura power and could see tears in Pikachu's eyes, making her cry a little as they all went silent.
Yoshi and Kirby turned around and went back to them to get them back to the future, knowing Pikachu would be distraught, but were proud he let the past play out as intended.
-Time Nest-
Yoshi and Kirby were alone, conversing with Mario, Link, Greninja, Future Rosalina and Shulk.
"You two did well today." Mario stated.
"That was a heavier bit of history for Pikachu that I realized..." Greninja said. "I was careless..."
"It's not your fault, Greninja." Future Rosalina told him, before saying. "I didn't think he ran off like that after he came back here. If he had gone through with the whole thing... Well, it would be one more mess to clean up. And that'd be even more difficult. I am glad you two were there. Thank you."
"So what happens to Pikachu now?" Yoshi asked, concerned.
"I think Pikachu could really use a break after this one. Lucario and Charizard are with him." Link advised. "We have to continue protecting the timelines without the Pokemon for the time being."
"Right. Wario and Waluigi may been defeated but Mewtwo and the others are still at large. We must be cautious." Shulk said in reply.
A/N: If anyone have any Bayonetta and Metal Gear Solid knowledge, please let me know because Snake will be in Bayonetta's world next.