[heirtothemonado]

This is based off a headcannon that I brought up in chat, that the Pikachu in Smash Bros, from Brawl onward, is the Pichu from Melee, and that the female Pikachu introduced in Ultimate and the Pichu that was re-introduced are his wife and child, respectively. 

---

Pikachu walked up the steps to his house, utterly exhausted. That was the third time the young Pidgey had gotten lost in Apple Woods this week! He should be charging more for this. Shaking his head, he headed inside.

"Anyone home?" he called out, but he received no response. "Heh," he thought "they must be getting groceries at Treasure Town" Pikachu smirked at the thought. He wasn't envious of Pichu right now, that's for sure. Chica could haggle with the Kecleon brothers for hours before they settled on a decision, usually only a few coins lower then where she started.

Since they'd be gone for quite a while, Pikachu figured that he might as well relax a little. Walking into the kitchen to grab a bite to eat, his eyes wandered to an envelope that was on the table. "Strange" Pikachu thought. "Pelipper usually leaves these in the mailbox." Grabbing the letter and tearing it open, he began to read.

Mr. Pikachu

First of all, on the behalf of our entire staff, let me extend a congratulations to both your marriage and the birth of your son. We hope that thing are well with both of them, as well as yourself. Now to business...

It is our pleasure to invite you to re-take your spot in the roster for the fifth "Super Smash Brothers" Tournament. WE are currently working to get all previous entrants on the roster this time around, so we do hope you can attend

Pikachu looked saddened by the letter's contents. The Smash Brothers Tournament? That would keep him away for at least a year! Probably more! he couldn't be away from his family for that long. Not when Pichu was still so young. Chica couldn't handle that kind of stress. Leaving the letter on the table, Pikachu started to walk toward his room when he noticed the envelope still had something in it. Reaching his paw inside, he pulled out.....three admission passes? Could that mean....?

Pikachu dashed back to the discarded letter and began reading again...

However, we know that as both a new husband and father, leaving your family at this time, for such a long time, would be impossible. That is why we have enclosed two extra admission passes with this letter, in hopes that both your wife and your son could join us as well. Your son would also be perfect to fill the Pichu slot on the roster, since you have evolved since then. We hope to hear of your confirmation soon

Yours in Smashing,
Master Hand

Pikachu couldn't believe it. They could come with? And Pichu could fight with them? This was amazing news! He had to tell them right away! Pichu had some training to do as well, and they needed to let the rescue team know of they're absence and.......

All these thoughts and more raced in Pikachu's head as he ran to Treasure Town, excited for the trip ahead. He could fight alongside his son! That wonderful thought jumped to the forefront of his mind, and that, Pikachu thought, was the most important thing he could think of.