Dreamyard

There are 2 trainers. 1 has 2 Purrloin Lv. 7, and the other has 2 Patrat and a Lillipup, all Lv. 7.

The person after the trainers will give you a Panpour if you chose Snivy, a Pansage if you chose Tepig, or a Pansear if you chose Oshawott. These are super effective against the Gym Leader's best Pokemon, so make sure you have an empty slot in your party. There's an X Defend right after, so grab that. Now head to the Gym!
GO TO STRIATON CITY
When you beat the Gym, come back here at the request of Fennel. Cut the tree in the way, and find Bianca. You go along, see a Muuna, then Team Plasma comes along to get that Dream Mist stuff. Battle those Grunts! One has a Patrat and the other has a Purrloin, both Lv. 10. Then Ghetsis appears. In 2 spots! Then he teleports and disappears. What's up? Turns out it was a Muusharna. Fennel runs up, grabs a Poke Ball, and runs off.
In the grass you can find a Muuna. There are a few items. Grab 'em and head to Route 3.
GO TO ROUTE 3

Striaton City

First, go to the Pokemon Center and heal, then save. In town there are 2 Great Balls, and 1 Dusk Ball. In the trainer school, there's a dude who wants to quiz you. Answer Antidote and then Awakening, and a Full Heal will be yours. Talk to Cheren and he'll battle you.
He'll have a Purrloin Lv. 8 no matter which starter you picked, and his starter is Lv. 8 (for name, go to Nuvema Town).
After you beat him, he'll give you an Oran Berry. DO NOT CHALLENGE THE GYM!!!! Believe me, there's an awesome Pokemon that will be very helpful in your Gym Battle.
GO TO DREAMYARD
If you want to challenge the Gym, here's their Pokemon:
They all have a Lillipup Lv. 12.
Cilan has a Pansage Lv. 14.
Cress has a Panpour Lv. 14.
Chili has a Pansear Lv. 14.
Beat them and the Trio Badge is yours!
Then a girl named Fennel comes along. She takes you to her lab and gives you HMO1 Cut. Whoopee! Then she says she needs some Dream Mist. Mosey on over to the Dreamyard to get it for her.
GO TO DREAMYARD

Route 2

Grass

Patrat (40%)

Lillipup (40%)

Purrloin (20%)

Shaking Grass

Audino (100%)

On this route are the first trainers. They have Lv. 7 Patrat, Purrloin, and Lillipup in that order, with one on each team. At the end of the route, go up the stairs and you'll find a Poke Ball and a Potion. When you get down, there's a tree in the way, to the left. You can get this after the Gym, but don't worry about it now. Save, because Bianca is about to battle you.

She'll have a Lillipup Lv. 6 no matter what you pick. Her starter is now Lv. 7 (for starter's name, go to Nuvema Town).

After beating her, head to Striaton City.

GO TO STRIATON CITY

Accumula Town

Head to the Pokemon Center and the Prof. will lead you in. Bianca is there, too, and they will guide you around the center. At the Poke Mart, buy some more Poke Balls and a few Potions.
When you get out, some people are like, "Hey, something's happening!" In the square, a bunch of dudes in grey suits are gathered. A guy named Ghetsis comes and is all like, "We are Team Plasma and we will liberate Pokemon, blah blah." After the speech, a guy named N (I know, horrible name for the leader of the bad guys) comes up and battles you.
N has a Purrloin Lv. 7. Show him who's really boss and kick his butt!
After you beat him, he goes away. Heal up and head to Route 2. Don't forget to explore the town!
GO TO ROUTE 2

Route 1

Grass

Patrat (50%)

Lillipup (50%)

Shaking Grass

Audino (100%)

You and Cheren and Bianca take your first steps on Route 1. The Prof. shows you how to catch Pokemon, and gives you 5 Poke Balls. Bianca initiates a catching contest. For now, just catch a Patrat and a Lillipup. Talk to the lady in the middle of the second patch of grass and she'll give you a free Potion. Save it--you'll need it in an upcoming battle.
At the end of the route, you get a call on your Xtransciever. It's the Prof. calling to tell you to hurry up. So proceed to Accumula Town.

GO TO ACCUMULA TOWN

Nuvema Town

In the beginning of the game, Professor Juniper appears and talks to you about Pokemon. Then you choose your gender and your name. You meet Cheren and Bianca, your rivals, and then you go to your room. You pick a Pokemon, and then Bianca will battle you.
If you picked Snivy, Bianca will have an Oshawott Lv. 5.
If you picked Tepig, she'll have a Snivy Lv. 5.
And if you picked Oshawott, she'll have a Tepig Lv. 5.
Keep using Tackle, as she should waste time with Leer or Tail Whip.
After the battle, you notice your room is trashed. Who cares, just battle Cheren.
If you picked Snivy, Cheren will have Tepig Lv. 5,
If you picked Tepig he'll have Oshawott Lv. 5,
and if you picked Oshawott, he'll have a Snivy Lv. 5.
Again, keep using Tackle. When you beat him, your Pokemon should grow a level.
After the battle, go downstairs. Cheren and Bianca are talking to your mom. They leave, your mom heals up your Pokemon, and gives you the Xtransceiver. She'll be able to heal your Pokemon, which will be handy during Route 1.
Head to Bianca's house, in the bottom left corner. Her dad yells at her for starting an adventure. Now, proceed to Prof. Juniper's lab. You can nickname your Pokemon, and then the Prof. gives you a Pokedex and asks you to catch lots of different Pokemon. As you leave, your mom gives you the Town Map.
Now, go and take your first steps on Route 1!
GO TO ROUTE 1