You've resized it (though ironically it would be hard to tell the major mistakes if it wasnt) and destoryed the quality of the sprite, and you recoloured it using the paintbrush tool rather than the eraser tool.
I suggest you read one of the tutorial's about recolouring.
Don't resize it, don't use paint default colours.
Read a tutorial for the proper technique. You should also use the sprites not te sugimori art (It's easier and judging from this im gonna guess youre not the most advanced spriter.
First, work on real sprites instead of Sugimori art. Second, use Fill, not Brush. Third, it's WAY too big. Fourth, they're not even the right colours. Finally, that's not even a sprite.