Pokemon Diamond/Pearl Walkthrough:

• Jubilife City
• Route 203

City of Joy

Once you arrive at Jubilife City, Dawn, expectedly, will talk to you. She tells you that Rival is at the Trainers' School. This is located right across from the Pokemon Center. There, Rival is memorizing notes from the blackboard. Give him the Parcel, which turns out to be two Town Maps. He'll you one of the maps and will head off to Oreburgh City. There are two trainers/students on the blue mat; you should battle them to gain some more experience. After defeating them, the boy will give you TM10 - Hidden Power, the very move their Abra used on you.

If you leave and try to go north, a man will approach you and ask you to find three clowns to obtain a Pokemon Watch, or Poketch. One of them is directly behind the Pokemon Center; he'll ask you a simple question and if you answer it correctly, he'll award you with a Coupon used to obtain your Poketch. By the way, the answer to all the questions is "Yes". Go north, and you'll see the Jubilife Condominiums. Inside, a lady will give you Quick Claw. The other clown is located across the condos, at the entrance of the Jubilife TV Station. The final clown is a little to the west, standing outside the Poketch Company. Now that you have all three Coupons, the man who approached you earlier will give you the Poketch. You can find out detailed information about all the features of the Poketch by checking out the Poketch Guide.

Now go to the station past the Poketch Company and talk to the Fisherman inside for an Old Rod. After that, go all the way east. You may want to explore a bit of Route 204 by going north. You can pick up a Parlyz Heal near the pond and also an Antidote in Ravaged Path (the cave). However, you won't be able to go any further than that for now. Go east from Jubilife City to get onto Route 203.

Route 203

You'll battle Rival for the first time on Route 203, so be prepared. He uses a lv. 7 Starly and a lv. 9 Piplup (should actually be whatever Pokemon that has a type advantage over you, but for the purposes of this walkthrough, assume he picked the Water-type starter). After this battle, keep on going east. On the way, you'll battle trainers, and pick up a PokeBall and a Repel. Route 203 ends at Oreburgh Gate. At the cave's entrance, a man will give you HM6 - Rock Smash. However, you won't be able to use it until you get your first badge. Continue through the cave, battling the two trainers, and come out the other side. You are now at Oreburgh City.