Step 1: Materials
You will also need a picture of Mario, or the video game sprite you wish to create. I got the image from the good ol' internet, and "Zoomed In" in an image editing program. I selected "show grid" and took a screen shot which I cropped and printed. This was my guide.
Since I was using a black and white printer, it was hard to distinguish certain parts, so I recolored some pixels to improve contrast.
Step 2: Action
It was actually fairly difficult to get the spacing right. It is easy to place the pins close together or too far apart. Just keep trying until you get a nice neat row.