So, here's a fun game for you /vp/

Nintendo gives us a little more info on Sun and Moon, and it turns out this game is marketed more towards older/more serious fans. In addition to a slightly more in depth story, a higher difficulty level and focus on strategy, more focus on the metagame and a dark type gym, it's announced that there will be somewhat of a dating sim aspect to the game.

Throughout the game, there are several characters that can be romanced by the protagonist throughout the game, with an even distribution between genders. half of each gender are wholly original to s/m, and the other are from previous gen. of these, some can only be romanced by one gender, while the others can be romanced by either.

My question to you is, of both gender, which of the characters from the previous generations would be exclusive to one gender, and which would be available to either?