Of course you could. I'm pretty sure you could nominate your balls if you were so inclined. That doesn't mean they'd take it seriously.

If Nintendo does create characters from 3rd party ballot admissions...I wonder if this could become a huge deal? Microsoft and Yacht Club as well as the Shantae devs have been somewhat vocal about approving or desiring their characters in the game. So could we see with the remaining of Smash 4's and later with Smash 5 if they do this ballot from the start companies supporting or even pushing campaigns for their characters to be in? That could lead to a lot of long lasting hype.

Now obviously, a Nintendo character has a much greater chance at getting in than a third party character.

Just for the sake of example, if a character like Wolf or Roy needs 200 votes for a chance at getting in, someone like Shovel Knight might need something around 500 votes or so for an equal chance of getting in.

U can submit any character you want .........."on the poll " but in the final product i doubt it will happen unless they have some marketing deal. Hell i would love to see Regie as playable character