Just wondering do you use your own made-up Pokémon in your fanfic?

In my fanfic "Jewel Eyes," I had made up six legendary dragons. I even written the legend behind them as well as having one of them living inside a Pokémon. (Sorry, I can't tell you more. You had to read my fanfic to find out. I don't want to spoil everything.)

BTW pretty soon you're going to see my artwork of them too.