I'm going to teach you how to make a clean, PNG.
We're gonna use this image
First create a New image file, it should be transparent, make sure it's a little bigger than the picture you're going to extract, we're going to size it by 500x536. Now select the Move Tool, and move the image we're gonna extract into the transparent image. It should look like
this. Now, select the Zoom Tool, and zoom into the image as many times as you like, I would recommend 700%, but in this tutorial we're gonna zoom in 1 time. Now, right-click the Lasso tool, and select "Polygonal Lasso." Now, select a part of the image you want to
extract your image should now look like
this. Now, press Ctrl and Enter at the same time to extract the image, it should now look like
this. Now continue to do that step until you've extracted the whole image, your ending result should look similar to this.
Click
Now go to File>>>Save for Web>>>And select PNG-24, and click the box that says transparency>>>Save.
Click
That's it! Easy enough huh? Now you know how to create PNGs!