If you are looking for some stencils of a scary bat to use this Halloween, there are several websites that offer them for a fee.
Scary Ideas
666 Vamprye: 666 Vamprye logo of a bat in a circular shape with the satanic numbers “666” and text “Vamprye”. The shape of the creature and wings also resembles a skull. It is a shaded carving pattern that costs one credit to download and use. Although, there is a minimum purchase of three credits.
Vamp: This Halloween themed stencil is a good mixture of cute and evil. The image is of a cartoon bat with a Count Dracula style face and blood dripping from its fangs.
Three Flying: This stencil is of three scary vampire bats flying. It is of easy to moderate level of carving difficulty. The pattern costs $2.50 to use.
Creepy: This pattern is of a creepy vampire bat with its mouth wide open. $3 minimum purchase.
Various Stencils: The Pumpkin Wizard has a scary vampire bat stencil that is available to its members. Membership is $7.95 and gives access to all of the website’s pumpkin patterns. You can view a preview of what is available to its members.
Free and Easy
Easy Option : This is a PDF file of several free Halloween themed pumpkin carving patterns. The one of the bat is not really scary but if you are looking for something easy to carve, it is your basic silhouette of the animal so it should work well for kids and beginners. (Download PDF file)