Hey, I'm the one that did this. Right down to the moveset, that's my screenshot. I ripped Matt's Mii data from my Wii Sports disc and injected it into my Wii, and through some shenanigans, took it from my modded Wii, to my 3DS, and then to my Switch via an amiibo. Then I just made the Mii fighter as per usual and tossed it on shared content back when I was subscribed to NSO. It made the rounds online, which was a neat surprise. I went by Tomo at the time and nowadays go by Momo on everything that isn't Smashboards. Funny to see it pop up again over a year later, haha.