There shouldn't be and mustn't be such content. Pokemon is a beloved franchise for all ages, and pornographic comics related to it are completely unacceptable and against all norms of decency.
Absolutely not. Porn comics are often not safe as they can promote unhealthy behaviors and distorted views of relationships and sexuality. They may also violate legal and moral standards.
Definitely illegal. Producing, distributing, or possessing child porn comics is a serious crime because it violates the rights and safety of children and is against the law in most countries.