All of the Enchantimals items manufactured by Mattel itself have one or two numbers on the back of the packaging, usually in the lower right corner. These numbers are the product numbers, which Mattel assigns to its products — whether they are related to Enchantimals, Monster High, Ever After High, or something different altogether — so that they can be systemized. In case of two numbers, the first is the assortment number and the second the model number. In case of only one number, it alone is both. All items that have the same assortment number are part of the same assortment.
The reason product numbers are interesting is similar to why trademarks are: they tell something about the franchise's development. By default, an assortment number is followed in order by its model numbers. For instance, the single pack assortment is DVH87 and divided in DVH88 & DVH89, DYC75 & DYC76, and FCG64 & FCG65, meaning that its six dolls were thought up in pairs in three stages and that Bree Bunny and Felicity Fox were the first characters designed for the franchise.
Because the product numbers by default are ordered, irregularities in the order of the product numbers indicate changes of plans up until shortly before production was started. Enchantimals had such a case at launch with the small theme pack series being FCC62 while its first entry is FCC64: Paws for a Picnic w/ Bren Bear. FCC63 thus is missing and according to Amazon and EANdata belonged to a duck enchantimal.
Other oddities to keep in mind when looking at product numbers is that sometimes international versions of the dolls have different ones from the USAmerican versions.
|Reg-1Ass-1D||2017||DVH88||Single packs||Bree Bunny|
|Reg-1Ass-1D||2017||DVH89||Single packs||Felicity Fox|
|Reg-1Ass-1D||2017||DYC75||Single packs||Sage Skunk|
|Reg-1Ass-1D||2017||DYC76||Single packs||Patter Peacock|
|Reg-3Ass-Ass||2017||FCC62||Small theme packs||Assortment|
|Reg-3Ass-1D||2017||FCC64||Small theme packs||Paws for a Picnic w/ Bren Bear|
|Reg-2Ass-1D||2017||FCC65||Small playsets||Built for Two w/ Taylee Turtle|
|Reg-1Ass-1D||2017||FCG64||Single packs||Karina Koala|
|Reg-1Ass-1D||2017||FCG65||Single packs||Lorna Lamb|
|Reg-3Ass-1D||2017||FCG78||Small theme packs||Sleepover Night Owls w/ Ohana Owl|
|Reg-3Ass-1D||2017||FCG79||Small theme packs||Let's Flamingle w/ Fanci Flamingo|
|Reg-2Ass-1D||2017||FCG93||Small playsets||Fruit Cart w/ Merit Monkey|
|Reg-1Ass-Ass||2017||FCG94||Large playsets||Playhouse Panda Set w/ Prue Panda|
|Reg-1Ass-2D||2017||FDG01||Large theme packs||Garden Magic w/ Danessa Deer, Fluffy Bunny|
|On-1Ass-3D||2017||FMG18||Three packs||Friendship Set w/ Patter Peacock, Lorna Lamb, Bree Bunny|
|Reg-1Ass-6D||2017||FNR86||Six packs||Friendship Collection w/ Lorna Lamb, Bree Bunny, Felicity Fox, Merit Monkey, Patter Peacock, Sage Skunk|