Just do what the game says until you get in to the town. Now go in to your rival's house, but right when you walk up to the door, THUD!!!!! Your rival is there. Talk to him and follow him. He'll say some stuff and leave. Follow him. Bring him to the lake, you will go in the tall grass, and you and your rival will get attacked by some Starly. This is when you get your starter.These are theyre stats...
Piplup is an okay starter.It's only good against two gyms, but evolves to be very, very, good team member.
Chimchar is a around the worst starter to pick. It's only good against 2 gyms!!! But it will evolve to make a team member. What the hay! I'll take it!
After you defeat the wild Starly, Dawn will come back and discover you used the Pokemon. She says to come visit Prof. Rowan. Then you go home and rat yourself out. Its honestly sad. You go and when you get there, good old Barry is one step ahead again. You talk to Prof. Rowan, and you get to keep the Pokemon. He gives you a Pokedex. Then you see Dawn...