>>44262748Most pokemon don't want to have romantic relationships with humans, but the ones that do probably just like them because they are handsome/sexy/cute/strong/brave/cool/confident or set a precedent that caused them to find them attractive in some respect. See James & Mareanie, Ash & Bayleef, and Ash & Latias. Not to mention if Pokemon can view Humans as Mothers and Fathers (See May & Manaphy) and have higher levels of thinking, really anything is possible in terms of reasoning for them to romantically love humans.
