Super Smash Bros.'s most fearsome Mario
I mean people have been upscaling Tour assets for Mario Kart 8/Deluxe. They transition smoothly too; their facial expressions correspond nicely, and even their occlusion texture maps work for Mario Kart 8 Deluxe and are at a resolution that works too. Heck, Tour even provides UI stuff that fits the Kart 8 UI decently.Hey, since they already have the models in Tour, they can just upscale them for a new game and it wouldn't be much effort (hopefully).
These mods are made for Mario Kart 8 but it's ridiculously easy porting those mods to Mario Kart 8 Deluxe through use of Switch Toolbox.