When my son wanted to be Yoshi for Halloween, we knew that meant homemade. We started early and used felt to create the body by adapting a penguin pattern, Simplicity 3639, leaving lots of room to stuff it with recycled plastic bags. We made a shell to attach to the back and found a rather large Mario to ride on top of the shell. We made shoe covers for the feet. The head was the challenging part. I used an old bike helmet, and attached balloons for the head, cheeks and eyes. I then covered it all with plaster impregnated gauze (like casts were made of) to create the right shape. Then I attached a felt neck and in the front used gauze material for him to look through, but to conceal his face. We also made gloves for the hands. He carried a Yoshi bookbag for a loot bag. We spent evenings for about a week and half working on this one, as we had drying time with the gauze and paint. Time well worth it, as kids were asking for his photo!