Please make sure backgrounds are transparent or serve a purpose - don't just post a single color background unless it fits. If you need help making a background transparent please refer to the FAQ.
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Pixeljoint has some rules about submitting pixelart.
cure (a Mod), requested you remove the useless background (thanks) so reporting stuff like that is unrequired.
Also, the preview file is a scaled version and is also not cool. Upload (hit edit details link above) a section of the art, thx :)