Ask 2 different questions for 2 differents topics
The right behavior would be to make two separate questions, one for Yu-Gi-Oh! and one for Pokemon, as the only thing that would link the two questions is the fact that they are both animes. Those are two differents questions, with their respective universes and their respective stories.
From the help center on "How to ask a good question" :
If you ask a vague question, you’ll get a vague answer. But if you give us details and context, we can provide a useful answer.
Having the same question over two different universes is not a duplicate if it stays in the range on the series because their answers are completely different
You can ask a question about Yi-Gi-Oh!
The tag yu-gi-oh does exist and has some constistent answers on it, there is no reason why you shouldn't make a question about this anime/manga as long as they respect the rules of the Stack Exchange. Don't be afraid of closes and downvotes : if your question is relevant and is well formated, there is no reason why anyone would downvote you, and we must and we will do what it takes to let this question open (if it fits the general rules of course).
Your question does not need to be more specific
I'm interested in knowing if there are censored or discarded Pokemon creatures, and if so, what are the motives behind it. Has Satoshi Tajiri published information about it?2
2 With the last statement I mean if Satoshi Tajiri approved or rejected the idea/fact of censoring his creations, or if he worked in the censored version, etc.
This particular sentence and its annotation are great, the context you introducted before, while not necessary, is still okay. The fact your question got upvoted 6 times with no downvotes reflects what the Stack Exchange's community feels about it : it is good. You explain us in clear details what you are looking for, and ask for potential official publication. I don't this why this should be reworked.
If you have a conflict between different answers, you can then edit your post to explain what kind of answer you would accept, therefore showing why you choosed an answer over another one. Bear in mind that I don't think a lot of people here would be offended of not having his/her answer accepted if they are given the reason why.