In Pokémon Diamond and Pearl and Pokémon Platinum, Twinleaf Town is the character's home town. This is the first time that there is not a Pokemon Lab in the starting town. It has four houses, the house in the bottom right hand corner is the character's house. The house in the upper left hand corner is the character's rival's house. Twinleaf Town also has a small lake at the very bottom.
Events
The Beginning
You have just watch the episode of the Red Gyarados. Then head downstairs and your Mum will tell you that your friend is looking for you. She also warns you not to go into the tall grass. Then head outside and go to your friend's house at north-west.
Blocked Route 201
You cannot access to Route 201 unless you talked to your friend.
Meet Your Buddy
Head to your friend house located at northwest of Twinleaf Town. When you reach the entrance, your friend will knocked into you. Then he went off and went back again to take the things he forgotten. You enter the house and go upstairs, you will see him packing his things. He will then run downstairs again. Meet him at Route 201.
Then walk to the left of the Route 201 and enter Lake Verity. See Lake Verity if you want to continue the story.
After Battle
After the Pokémon battle and meeting Professor Rowan and his grandkid, you will return home. Your mother tell you to meet Professor Rowan at Sandgem Town and gives you a Running Shoes. Now head to Route 201 and began your journey to Sandgem Town!
Pictures
Player's House