I love how this replicates the Super Paper Mario artstyle flawlessly, while hints of your artstyle still shine through - particularly with the shading.
I have this feeling that Paper Mario's pose is supposed to reference something, but I'm not sure what said reference is, exactly.
I also adore how all the game's antagonists - minus Mr. L - are in the background. Feels like I'm looking a single frame to the intro of an anime like Jojo's Bizarre Adventure.
You could probably edit this into a piece of fake boxart for Super Paper Mario and it'd go hard, imo.