Is there really anything morally wrong with wanting to fuck a pokemon? I'm being completely serious, when you look at it factually there's nothing wrong with it.

I would assume that as advanced as the Pokemon world is people would be smart enough to realize there's nothing bad about it morally. Kinda like gay marriage here, sure it's weird and frowned upon by normal people, but there's nothing overtly terrible about it. Pokemon are companions that understand you more than any other animal, and obviously if they didn't want to have sex with you they could just stop you because they're all fully capable of doing so. Though in some cases where the pokemon is ill fitting for fucking like first stage mons or pokemon that aren't particularly capable (magnemite, slugma), would obviously be restricted. Though when it comes to fully evolved humanoids like a Machamp or an Infernape, there's no reason that sex with them should be restricted.

There's no negative downsides to it and it would probably do a better job at strengthening your bond with your pokemon more than anything if you both wanted to do it, and obviously some pokemon probably experience natural urges to mate and expressing them with a loving trainer would help them out in this case, with the added factor that no unwanted eggs or human pregnancies would ever happen 100%. So basically having sex with a pokemon would be morally right and even beneficial if the pokemon would be willing to do so and if you're both giving consent and the pokemon is fit to mate then there's absolutely nothing wrong with it if you get past the 'weird' factor.