take some paper and make a drawing of makar about an inch bigger than you want the actual doll to be. When it is stuffed and sewn together it shrinks in size. Focus on the outline of him, for my doll i did a basic egg shape with his two tree branches on top, with little arms, and stubby legs. All you have to do is draw the outline of him and cut it out. That is your pattern for the lighter brown base color.
For his face, draw a spade shaped leaf on another piece of paper. Make sure it is big enough to overlap his body a little bit, but not too much. That is your pattern for the leaf-face. Also, draw his eyes and mouth and cut them out. Make sure they're sized right! Cut those out in black fabric (this is all fleece btw). Also cut out the leaf in light green.
Sew the black facial features onto the leaf. Oh yeah, don't forget to get a jingly bell or two! Thats for the inside so he jingles like in the game!
Next go back to that piece of paper you cut out for his body. Put the leaf paper on top to see where will be covered up by the face. Draw big spikey stripes along his body (see my doll). This will be the darker brown color. Just try and follow my example and look up a picture of him in the game if nessasary. I kinda made up my stripes to work with the shape of the doll. Cut those out and sew them to the back piece and front piece of the doll.
Next sew the green leaf face onto the front of the doll. Do not sew too close to the edges because you need it to flip over when you sew the entire doll together. In other words... the part of the face that goes outside of the body of the doll needs to be folded in when you sew the body shut. This way you can sew the face on now without having to hand sew it after the body's done. I hope that made sense...
Last thing before closing this boy up! Add two jingly bells to the bad side of the front piece. This way there are bells inside the doll so it jingles. I just use a needle and tie the bells together (not tight but not too loose) and then sew them onto the doll's inside. I usually put them under where the leaf covers so you cannot see the knots in the front.
Finally pin (good side to good side) the front and back pieces of the doll together. (make sure you've pinned the face away from the edges so you don't accidentally sew it down!) Sew the edges of the doll together stopping either on the bottom or one side so you can turn it inside out.
Turn inside out and stuff! Then stitch up the hole! You're done!
I hope that helps! Good luck!