This actually annoys me a bit. One of the reasons I loved TP was that there was zero romantic subplot for LinkxZelda. (Instead we got Ilia, but in my mind they’re friends, nothing more). BotW’s Zelda was a little to romance-heavy for me...and that also is the basis of why I think Mipha’s by far the worst character (that and her VA)
Granted, everytime we come to this topic, it all goes back to our experiences. I’m ace, so I prefer to consider my heroes without any romances whatsoever (also I’m left-handed, so Link is a canon lefty in my mind and SS and BotW and now Smash are just wrong). I’m the person who will look at most pairings and assume that everyone sleeps in their own beds at night. However, I don’t think there’s anything inherently wrong with filling in gaps in a character’s story yourself. What is wrong is criticizing others when their headcanon is different from yours. If people are reading into things that I’m not (from personal experience, I’m also incredibly bad at picking up cues, so there’s a good chance that someone saying “you’re cute, let’s bang” will translate for me into “friends with benefits”), that's fine.
What anyone does behind closed doors is none of my business. Especially Smash characters. And personally, I’d rather not know specifics.
...yeah, I’m not a fanfic writer. The only real headcanons I have are that Bowser and K. Rool each work together but tbink the others is an idiot, and neither know Ganondorf is manipulating both to his ends. Ridley knows Ganon’s in charge, but he doesn’t care as long as he has free rein to terrorize.
And that one pic on the official site (and Pichu’s new bandana) convince me that Isabelle, Pichu, and Squirtle are all totes BFFs