Fakemon in fanfictions

[Mikachu Yukitatsu]

But how should you exactly describe a Fakemon? I mean without interrupting the story badly. You don't have to describe the already-existing Pokemon, at least not that precisely, so it may be quite hard for some readers to get why some Pokemon are descibed better than others. And how do you realize that? You see, we have a battle between trainer A and B, A calls out Pikachu but B a Fakemon called Kaikku, and then you have to make the reader get a good picture of it, whereas everyone already knows Pikachu. So what tense should we use is one of the problems. You should put 'Kaikku is a loon-like Water/Flying type with sharp beak' or something there, all of a sudden. But perhaps it's just me that has a problem with that.