This Mario sprite recreates the modern Mario with SMW graphic style.
I'll have to reject this graphic due its overall quality.
First thing, the outlines are inconsistent which cause some problems, like a bit of clashing with the sprite itself. Instead of having a a brown and a black outline, you must choose only one, so its consistent. Second, I suggest that you redo the shading because the hat seems more detailed than the rest of the player sprite. Third, while this sprite is not a simple edit, it feels a bit lazy, because aside from the shading, there isn't much difference between it and the original Mario sprite. And finally, the overalls could use a bit better shading.
I suggest you redo the sprite, fix the mentioned issues and take a bit more of time. Pixel art doesn't need hurry, so take your time and continue to focus in improving that eventually you can reach far. But for now, this sprite would need an entire overhaul to be accepted.