Go to the berry master near fortree city and he gives u rare berries then go back the next day and the next be cause i f u get a reall good berry go fly to fortree city and if u go directly west you'll see guy behind a fake tree battle him and you'll see some berries pick them and then plant some rare berries like nomel or tamoto and you will keep gettin rare berries to give a pokemon or use in a pokeblock(only use the rare berries that say pokeblock ingredient) if it says a hold item don't use it in a pokeblock.