A Style Guide is a book companies have that is full of something called "production art" which was created solely for the purpose of putting on merchandise, or to use for promotional purposes. It also has a brief explanation of who everyone is, what their relation is to everyone else, some back story, their power ups... etc. The information portion is usually so people making the merchandise don't put, for example, Saiyan arc Vegeta fighting along side Boo just because he was (is?) a bad guy. A Style Guide could range from one sheet of paper to a phone book sized monster! I'd imagine a Pokemon Style Guide is huge, while something like Frozen, where you notice they use the same art for almost every piece of merchandise, is very small. Here's a very small look at some of the images FUNi has, you'll notice it's categorized by story arc!

It was really awesome seeing all this stuff and learning about some of the behind the scenes things we wouldn't have otherwise have known about. Like how Toei didn't want FUNimation capitalize on the "Over 9,000" meme because it was a mistranslated. All this was great, but what really peaked my interest was the rules. I don't know why, but I was really into what rules Toei gave FUNimation for using their characters on merchandise. They have about 5 pages of rules. I took pics with my phone but, the words are a bit blurry and hard to read:


At this point I coulda' just left it at that. Fine, the pics are blurry and hard to read, I'd just move on with my life and tons of people wouldn't even know it existed. But no. I'm a little crazy and decided to reproduce the rules section as best as I could for the sake of an open discussion! The only thing that's different is the images. I don't have these images so I used images that were as close as I could get. Also, the reproduction I did is word-for-word so when you see "catalouge", it's not a typo I made, it was a typo Toei made and I left it as-is just to be that similar.
So, now I give you~ Toei's rules for FUNimation when making merchande:





Also, I understand the words might be too small in these reduced images, so here's a link to the full sized pages.