Hi , the reason of my first reply is that in the following post PkmnHenry ask you the separation pixel of upper and bottom screen, and you told him to measure the pic you attached arquivo_shape_3ds.png
https://gbatemp.net/threads/custom-theme-thread.377399/page-162#post-5944687
I measure the image, found the separation pixel is 16, which is obviously incorrect and I did some calculations, and found 65-66 pixels is suitable for n3ds XL.
And in your template file, the separation pixel is 68 pixels, which is quiet close to my calculation.
IMO, unfortunately this 68 pixels is only suitable for XL, not for n3ds nor 2ds, because the different physical sizes.
I uploaded a pic which I used your template made a simple theme, you can see the upper and bottom lines are not aligned.
You can give me one of you one image theme to try on my 2ds.
Cheers,