>>33395983in irl, there's nothing wrong with jacking it to pictures of pokemon. You're not harming anyone, just don't let it become a core facet of your life, or ever talk about it with people.
In-universe, it's probably not cool. Since you have a clear position of power over the pokemon, it's like how we frown upon bosses hitting on their employees. Except in this case the power structure is even more defined, they're almost your slaves.
I think from that angle it would be looked down on, since clearly Pokemon are sentient and capable of consent.