Berry Master's Wife Likes Sweet Phrases!

When you are in Mauville city, cross the river on the route next to this city (with a beach). Go through both patches of grass and enter the Berry Master's house. Talk to his wife and tell her "Challenge Contest" (you can only do that after beating the elite 4) and she will give you a Pamtre berry. Go to Lilycove city and enter the contest hall. You can make an Indigo level 50 pokeblock there with 3 other people in the game without linking up! By the way, indigo level 50 pokeblocks will make a pokemon's beauty attribute VERY high, and it will be easy for you to win a beauty contest.