Jolteon is in the cover image. When I upload images I usually only upload pics I like from the very first version (which was around 300 images) where Jolteon only appeared near the end and never update the images again. The images currently uploaded are a bit unrepresentative of what it eventually becomes, but I don't want to pull a Doki Doki Literature Club and include a thing saying essentially "This game looks like a normal romantic visual novel, but it becomes a psychological horror visual novel that messes with the player on a meta level," because, well, that kinda defeats the purpose of presenting it differently only to subvert expectations later, right?
So, yeah, images and description are representative of the early parts of the visual novel so that stuff like the giant Rapidash, the Miltank with a feeder fetish, and the brainrot Pikachu can be a little more surprising and have a greater impact for the reader. Could it get more views if I was more upfront about that stuff? Probably, but although I would appreciate more views, downloads, and engagement the way that I want to get those views is by people posting on Reddit and Discord "Check out this bizarre visual novel. I don't want to spoil it, but some wild stuff happens in it."
Also, I know that some people are really into Pokemon x human stuff in the Pokemon AVN community, but you don't see too much of it because it's not as easy to do as human x human (the Goodra is very difficult to pose in this visual novel, mainly because I gave her a stupid hat that I hate working with now, it's part of why new updates take much longer than they used to) but also because Pokemon x human turns a lot of people off. I thought it would be better to start off with Pokemon x human, and also works better with the story I wanted to tell, then transition into human x Pokemon, and then later focus more on what I could do with Pokemon x Pokemon smut.
Hope this answers your question.