Another option for Yveltal breast milk could be to call it white chocolate or white milk chocolate.
Also an idea for a fish Pokémon for the fishing mini game could be Luvdisc. They can have the nickname "succubus of the sea" since one of their moves are draining kiss, so they would be very skilled at draining males of their cum. A funny bit of info could be that if a luvdisc really likes a male then if that male gets into the water even oceans away the luvdisc will know and very quickly arrive and suck him almost like a shark can detect blood in water from far away.