In addition to Aezora’s response, extrovert vs introvert being a description of your attitude to socializing is only a colloquial use of the term. I am a shy extrovert. I do not get social energy by being alone, like an introvert does, and I have problems talking with new people and even with friends prefer a back seat in the conversation.
Most people seem to fit into more clear buckets, if you believe the marketing, but that doesn’t make the buckets the definition.
Even if it was (a lot of similar designs are due to common inspirations such as folk tales, but also a lot are direct parodies, and parodies can be made legally distinct) (but also, the Pokemon team itself rejected the copyright suit suggested by the public in their own public statement a while ago) the lawsuit is over parents, not copyright. Patents implies technological theft. Or bogus patent claims, more often than not. (Patenting math should be illegal, for instance.)