Well, you do win accesories from each contest you beat (by level and catogory, of course). If you beat all of the levels in the contests, Mr. Goods will give you an item for your secret base underground.
You can't store items on Pokemon Diamond and Pearl, as your bag now can carry an unlimited supply of items.
Use items or go to a Pokemon Center to heal your Pokemon.
a Pokemon just follows u and sometimes ur Pokemon finds items like for Pokemon contests
somehow
you are unable to send any items from the past games to pokemon black/ white
You can't rotate items. They stay in the direction you get them in.
Some hidden items are in the Safari Zone as well as some Pokemon.
face it and press A
sooth bell
Action Replay. That is the only way that I know of.
get an action replay and get the all items cheat for it.
no where ha ha who ever you are