Had two funny thoughts.
1) When Xerneas joins the harem and when she meets Mew she acts as a fan girl meeting her biggest star she looks up to. Since Mew is the mother of most Pokémon she has been pregnant the most number of times in the world and loves sex like she does but likes pregnancies more so Xerneas secretly aims to beat Mews pregnancies' count herself while still being chaotic.
2) Not sure where this could go but when the MC meets either a legend or a human boss that thinks themselves as a god it can have this in it. "Who do you think you are, I am a GOD" the MC response "I bang (or eat out) gods for breakfast... daily!".