Well, non-videogame characters and real people are obviously out of the question, but as for the characters I don't want in Smash that are from video games, there are a few:
· Fortnite guy - Shouldn't even have to explain this one.
· Freddy Fazbear (FNAF) - Doesn't have any chance of getting in, but regardless, it's best for Nintendo to just steer clear of all things FNAF. You know, just to be safe.
· Sora - If he were simply a regular Square Enix character or an FF protag, then I'd be more than willing to have Sora join Smash, but he has ties to Disney, which is a huge dealbreaker. Taking Disney into account, Sora getting in would definitely bring about irreversable ramifications that would ruin Smash forever. He would bridge the gap between videogame characters and non-videogame characters and the floodgates would swing wide open. Soon enough, the prospects of Mickey Mouse, Donald Duck, Goofy, and Wreck-It Ralph joining Smash would no longer be impossible, and eventually this would extend to other Disney-owned characters such as the Marvel superheroes/villians and Star Wars characters, then even non-Disney characters like the DC superheroes/villians, Shrek, Spongebob, and Goku. NO ONE should ever want something like this to happen to a game like Smash, but with Sora being a real possibility to make the roster, this will most likely be the consequence his addition will bring. So allow me to issue a warning for those who want Sora in Smash: BE CAREFUL WHAT YOU WISH FOR.
· Pepsiman - He's a character based off a corporate product for crying out loud.
· Sans - Any other Undertale character would be fine, just not him.
· Anyone from a mobile game - Another one that doesn't need an explanation.
· Steve (Minecraft) - As popular and iconic as Minecraft may be, the game has contributed an awful lot to cancer/cringe meme culture, which is best kept out of Smash. And it wouldn't look right if one were to place Steve next to any other character in the roster.
· Super Meat Boy - Wouldn't make any sense whatsoever and would be a very underwhelming pick.
· Tracer - Overwatch is all but dead thanks to Blizzard's questionable decisions in recent months, and Nintendo should avoid working with such companies.
[side note: regardless of Blizzard's standing as a company, the "Maybe I'll be Tracer" meme is enough a reason for me to not want Tracer in Smash. Also, Overwatch isn't even on the Switch to begin with!]
· Waluigi - He might be a fan-favorite among Nintendo fans, but simply being a popular videogame character owned by Nintendo is not enough to warrant a spot in Smash. Another thing, Waluigi doesn't have his own game and has only appeared in spin-off franchises like Mario Party, Mario Kart, or any of the Mario sports games, so he doesn't have much credible moveset potential. Lastly, people only want him in for the memes.
· The Chorus Kids - This is a very unpopular opinion, but just because something's a Nintendo franchise doesn't mean it should have a rep in Smash, which should be the case for franchises such as Rhythm Heaven, where the Chrous Kids are from. They might make for a good assist trophy at least.
· The Rabbids - Assist trophy/stage hazard level at the highest. Also they're absolutely hideous.
· Spring Man (Arms) - Despite Arms selling over 2 million copies roughly a year after its release (which made it one of the best-selling titles on the Switch at the time), it proved to be a major flop in terms of maintaining its player base, which has drastically dropped in such a short amount of time and failed to live up to the success of some of Nintendo's other more recent IPs like Splatoon and Xenoblade. Also, having Spring Man in Smash as a playable character would just show a lack of ambition on Nintendo's part, as he's assist-trophy material at best. Not good enough to be a fighter despite being from a fighting game.
· Agumon - He would just be a lame addition to Smash imo. Not much else to say besides that.
· Jibanyan - See Agumon above.
· Scorpion/Sub-Zero - I am well aware of the legacy and impact Mortal Kombat has had on the gaming industry: it was one of the reasons the ESRB came into existence. Also, Nintendo has shown that it has no problem incorporating characters from M-rated franchises, as we can see with Snake from Metal Gear, Bayonetta, and now Joker from Persona. But MK is not just any M-rated franchise, it is *THE* M-rated franchise. It is notorious for its overly violent, gory content, and would be very difficult to tone down in order to make Scorpion/Sub-Zero suitable for Smash without losing their character, and I would think many MK fans would view that as a disservice to not only the characters, but to Mortal Kombat itself. Besides, with Nintendo of America heavily promoting MK11 on their Twitter in recent weeks, wouldn't you think a MK rep getting in as Smash dlc would be a little too obvious?
· Geno - A side character who only appeared in one game that was released almost a quarter of a century ago and was never seen again (minus a cameo appearance in Superstar Saga), but if he were somehow revived from the videogame graveyard and a remake/sequel of Mario RPG were made or if Geno were to get his own game, then maybe I could reconsider. But for now, he's merely assist-trophy material.
· Heavy (Team Fortress 2) - I don't have anything against the character or the game he's from, I just don't think he would make any sense to have in Smash.
· Roblox guy - He'd be a very nonsensical pick, but it's not like has has any real chance of making the roster anyway, so he isn't much of a threat.
· Any MOBA character (i.e. League of Legends, DoTA, Heroes of the Storm, etc.) - They just have no business being in Smash.