i think all u need is a crinoline or caged crinoline like ones they used in the 1800s to give a dress more volume and petticoat netting. u can cunstruct a crinoline to any size, shape, width and hight u want so the shape can fit the one like charlotte's. then sew up a petticoat to use as an under skirt with alot of layers and put it on top of the crinoline to add even more volume, poof and flow. and dont forget to make the petticoat the same length so the dress does not look like a lamp shade. to give the back extra volume just sew more petticat netting there. and make sure fabrics and the petticoat netting is light enough to give the dress that same bounce as charlotte's. THANK U.