@Araxel
there's also a wimpod in the safari zone and the search for chansey, the pokemon in cages in carotos mountain, the statue in kristiline town, the missing miltanks in the ranch and the pokeflute, the aquamarine ore in aquamarine cave and tyrogue, the chikorita trade in route 2, the castform trade in terajuma jungle, the sandstream cave, the zorrialyn labyrinth, the mincinno in the hotel, the lvl100 budew in gearen park and you can "continue" a quest in the underground.
@Milotic finish all of the gearen city help quests and challenge her in the gym