Ever since he started his journey and have become champion his relationship with Delphox and him have increased sexualy. Ever since that he has become champion, Delphox has been acting weider around him for example, like rubbing her head on your lap while trying to lick his dick with his pants on which he tries to stop or when she sat on his lap while shaking her ass on his dick trying to make him hard which he also tries to stop. To figure out what's going on he decides to go to the professors lab to learn more of what's going on with his Delphox. When he gets there the professor reminds him that Delphox is a female in her mating season that started only yesterday and started in early summer and would end in late fall. As he learns this knows he starts to make a conversation with the professor on what to do then afterward he decided to leave the professors house to get back home. As he makes it back home and enters he is greeted by Delphox laying on his bed while looking at him a slutty smile like she was expecting him to blush. While he was processing on what's going on Delphox starts to speak which catches you by surprise since pokemon can't speak. Delphox tells me

"I have learned English language to be able to communicate with you honey"

she says in a low sassy confident gentle tone. He's left speechless, not knowing what to say until Delphox asks you a question which leaves him blushing as she says

"I've been waiting for you to come home to ask you if you would like to help me mate with you to be able to participate in the mating season this year"

she asks him un a tone that almost seems that she's pleading as she waits for a response.