>>38548532Bestiality aside, Harry was merged with his Pikachu for a lot longer than anybody else was with their partner. I wouldn't be surprised if Detective Pikachu 2 explores the merging some, with certain people having a mental bond or retaining certain abilities from their time linked to their pokemon, with Harry more affected than anyone else.
Maybe Lucy gets Psyduck's headaches until it evolves, or Watanabe's character snaps at people that get too close.