You can tell he’s been enjoying life recently, whether it be riding off the trail of Odyssey or just good times in general.
He’s actually smiling instead of just having a serious Smash face.
Y’know, like Mario usually does. It’s sorta like seeing that one co-worker outside of a work environment actually enjoying themselves, instead of something like this:
Where it looks more like he’s legitimately prepared for a fight. And yes, I get it’s Smash, but when a character like Snake can still do silly things from his series like spouting, “Tasty” after eating something, I think Mario’s okay in being a bit looser.