Alright guys, so I've been thinking. Whether Ninten stands a great chance of being added in post pass DLC or not, there is something we have to do. We NEED to expand the fanbase. Now, I agree, Mother 1 is a hard game to get into, especially with its more famous younger siblings. And the character is often brushed off. But we need to try, and to help get the complicated character across, I've made a Google Doc that I'm treating as a comprehensive guide to the character. Where he's from, what his game is like, how he fights, and what his DLC might bring to Smash, including potential stages, music (including a particular fantastic remix of Poltergeist mixed with Battle With a Dangerous Foe that I highly recommend), Spirits, and Mii Costumes.
What I suggest is helping me edit and expand the guide, then passing it around, getting people to know about the character. Remember, a lot of the other characters were once small, niche choices, and we have a headstart thanks to our character's series actually being in Smash. All we need is to expand our rank and we'll get in.
The Document as it stands right now. Be wary, it's a long read, but that's because I put a lot of time into this.