Really? What happened? He just made a case for why the character would be a good pick, and people just started believing that it'd happen?
As someone who’s been a supporter prior to last year, I think support naturally grew as Smash speculation started picking up.
Prior to Smash Ultimate’s initial tease, Smash was barely discussed here and on the internet in general. And when a big youtuber made a video, Decidueye was usually the one considered. I’ve seen a couple of people did suggest Lycanroc and I’ve seen a couple of people mention about wanting them, but it never went beyond that.
Delzethin’s video on Lycanroc would’ve been a year old (the older prior to Dusk’s reveal), and Lycanroc discussion was dead at that point. But then over a couple of days, a couple of people started to talk about Lycanroc and started forming arguements on why Lycanroc could’ve been included, and support started getting bigger.
I suppose the reason it wasn’t discussed as much was because Smash wasn’t discussed as much and people just went Decidueye.