In this town:
After arriving, somebody will call up to you. Go to the left to find Serena and Shauna and two more kids. They’ll start suggesting nicknames for you after the brief Introduction.
You can select a nickname from their suggestions or just pick your own. Should you do the latter, you can specify whatever nickname you want your new friends to call you.
Now comes the fun part; choosing your starter pokemon. Move the cursor over the pokeballs corresponding the pokemon of your choice and select it. After receiving your first pokemon, you can give it a nickname if you want. You’ll also receive a pokedex and the Prof’s Letter to your mom. You have to deliver the letter back to your mom so leave the town to the south. However, you’ll be stopped by Shauna, who’ll challenge you to a pokemon battle.
Shauna (Prize money: 500)
Pokemon (s): Any starter weak against what you chose
Unlike the other debut battles, you’ll actually have the advantage over the battle. Since I picked Fennekin, Shauna has selected Chespin. At LV5, your pokemon will have a special move in accordance of their type. Use that move to easily take out your opponent. Since Fennekin is a fire-type pokemon, I used Ember to take out Chespin in two turns.
After the battle, your pokemon should level up. Head back to Vaniville Town and deliver the letter to your mom. She’ll get you ready for a journey and even give you a town map. Leave the house and Rhyhorn will be send you off. Now head back to Aquacorde town and go to the plaza.
Talk to the man southeast of the fountain to receive a Potion. You can also buy some more potions from the store beside him. There’s a photo spot to the northeast corner of the plaza but you can’t use it yet.
There’s also another shop to the western side of the plaza that sells Pokeballs. Make sure to buy yourself some. As there is no Pokemon Center in this town, you can use the across the Pokeball shop, it is on the building beside the potion shop. Head north of the town and cross the bridge. You’ll eventually reach Route 2.