there is no official character named "Paul" in the Pokémon franchise who embarked on a Sinnoh journey. It is possible that there may have been new developments or additions to the Pokémon series . However, based on the information available up to that point, there is no relevant context or character fitting the description you provided.
If there have been any updates or new characters introduced in the Pokémon series, I would not have access to that information. To get the most accurate answer to your question, I recommend checking official sources or the latest Pokémon media to find the character you are referring to and their motivations for not wanting positive feelings and thoughts from others.