Okay, so I find a sprite of say, Pit from Kid Icarus. I want it to be bigger, but when I change the image size, it automatically blurs it at the edges. Does anyone know how to increase its size without that effect?
I am not sure how others do it....but I always duplicate it whenever I resize it and if it comes out blurry...on the top layer of the sprite I sharpen it and then mess around with blending options or opacity until I like how the sprite looks.
You could try putting it into a vector program like Illustrator, resizing it then moving it back into photoshop. If that doesn't work, then resize it and just go over the colours with the pencil tool.