Pokémon Diamond and Pearl/Twinleaf Town

Twinleaf Town (フタバタウン, Futaba Taun, Futaba Town in original Japanese) is the town in which you and your rival reside and from which you begin your journey across the region of Sinnoh.

Go down the stairs of your house. Walk outside and there you will see 4 houses. Your house is the bottom right. Your rival's house is the top left.

Events

 * Check out a new special TV show called The Search For Red Gyarados in your room head downstairs and talk to your mom. She lets you know your rival stopped by. Go to house and find out what he wanted.
 * When you go to your rival's house he comes out saying that you and him have to get to Lake Verity quick.
 * Go downstairs and talk to your rival's mom, she'll tell you your rival already went to Route 201. You better get going.
 * After Lake Verity (1st Visit) After receiving your first Pokémon go back to Twinleaf Town and talk to your mom, she'll give you the Running Shoes. To use the shoes hold the B button while moving with the control pad.
 * After Receiving the PokéDex After getting the PokéDex talk to your mom again, she'll give you the Journal. The Journal records all your day to day happenings. Once your mom gives you the Journal your rival's mom pops in to give you the Parcel. The Parcel is a key item you must give to your rival in Jubilife City. You better get going.

Pokemon Platinum

 * Check out a new special TV show called Ask Prof. Rowan in your room head downstairs and talk to your mom. She lets you know your rival stopped by. Go to house and find out what he wanted.
 * When you go to your rival's house he comes out saying that you and him have to get to Prof. Rowan to get Pokemon.
 * Go downstairs and talk to your rival's mom, she'll tell you your rival already went to Route 201. You better get going.
 * After receiving your first Pokémon go back to Twinleaf Town and talk to your mom, she'll give you the Running Shoes. To use the shoes hold the B button while moving with the control pad.
 * After getting the PokéDex talk to your mom again, she'll give you the Journal. The Journal records all your day to day happenings. Once your mom gives you the Journal your rival's mom pops in to give you the Parcel. The Parcel is a key item you must give to your rival in Jubilife City. You better get going.

Items
Odd Keystone - this is found in a clump of trees at the bottom of the patch of water, and Surf is required to reach it.