Pokémon Ruby and Sapphire/Fallarbor Town

The Pokémon Center and Pokémon Mart are at the entrance to the Town.

Inside the Pokémon Center, you'll meet Lanette. She's designed the Pokémon Storage System. To the west of the Pokémon Center is a Contest Hall. You must have the Normal Rank to compete here.

Pokémon Mart
Here's what's in the Mart:
 * Great Ball: 600
 * Super Potion: 700
 * Antidote: 100
 * Paralyz Heal: 200
 * Escape Rope: 550
 * Super Repel: 500
 * X Special: 350
 * X Speed: 350
 * X Attack: 500
 * X Defend: 550
 * Dire Hit: 650
 * Guard Spec: 700

Move Tutor
The house next to the Contest Hall belongs to the Move Tutor. He will teach a move to your Pokémon for a Heart Scale. You won't get any of those until you go to the bottom of the ocean later, but make sure you return to him.