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Compare it to other child-friendly series like Mario or Kirby. Pokemon aims to be cutesy and innocent, but it plays things too straight and often attempts world-building instead of going full nonsensical cartoon fun.
You're given just enough information to look in and imagine more, but not quite enough to where anything in Pokemon is explicit, causing your mind to go into overdrive filling in the gaps.
And then there's things like Tsareena which are so blatant that they reaffirm your suspicions.