I was just answering the question on who made those outfits that iluvwdw4ever had posted.
Just about any pix can be used as a pattern for applique, really 
Even clipart off the net.
I'm no expert, but this is how I do it & it works well for me. 
I just make a black & white line drawing of what I want to applique, enlarge it to the size I need & use it as a pattern.
Just about any picture will do ... Sometimes, it makes it alot easier to make some drawings into an applique, by removing some of the super-fine-detail .

... tiny bits look best embroidered or painted on, by hand (most of the time)
There's many ways to turn a picture on paper into an applique =
here's two ...
1. Use a light table ... You can cut & piece the fabric pieces by hand to make the design (I use wonder under to hold it all together), overlap ALL pieces touching (KEY!), and make sure you cover all overlaps when you satin stitch (zig zag) the design = so that all the fabric stays intact.
Personally, I adhese all my fabric with under wonder first, then use the light table to trace the design IN REVERSE from the paper design to the back of my fabric ONE PIECE AFTER ANOTHER, cut them all out *with tiny bits of overlap allowance added* ... then when I attach them together, I take those pieces and use the light table to line them all up on the paper design, before I press them together ... ... it's easier than it sounds/reads, really.
2. no light table = try this = Tape the REVERSE image paper drawing of the design to the back of a piece of fabric (lightweight, as a backer) ... take pieces of fabric that already had under-wonder on them, lay them ON TOP of the back fabric, turn it over & STRAIGHT STITCH through the design, on the lines of the picture. Turn it back over & TRIM the new fabric semi-close to that stitched line. ... Repeat this over & over with all the fabric pieces you need are in the design. ... when you are done, remove the paper image, press the design, put under wonder on the back, trim the design to ready it for application ... satin stitch all fabric edges in the design =
poof!
It's magic. From paper to outfit.
either way, it's alot of work.
But With Practice, Anyone Can Do It.
Good Luck in your endeavors.