I love your style! Big fan of the cleanliness of your artwork; it's really pleasing for my eyes. :3 I think tapering the lines a little at the edges will make it look even nicer, though, personally (tapering is thinning out the lines as they're at their edges, if you didn't know).
Pretty impressive mods too, they really give a feel of the actual Brawl games! The Bell Tower one is my favorite.
Awesome job, keep at it~