if you have the berry searcher app you can do this but to get the berry searcher you need to talk to everyone in Salaceon town one of the people will give you it if you say 'yes' once you have it check for berries one of them must be a razz berry
GOOD LUCK!
To get free berries on Pokemon Pearl, you pick berries you find around the region, plant them, and then pick them again when they are finished growing. With these, you can start the cycle again.
No. But some people give you berries and you can pick/plant them
random people, or trade berries for them in floaroma town
You cannot buy berries, but you can find them on trees, on wild Pokemon, or from another game.
Blackberry onix
I assume you mean Beauty, and yes, they can. the pamtre berry increases it greatly, and the razz berry I think. However, you need to make them into poffins before your Pokemon can use them.
Pick them off plants in the soil.
nothing happens if you dont pick berries. they'll just die eventually
i think feed it berries and dont let it die
Bidoof usually holds berries, the are always oran berries in Platinum, so it should be the same in Pokemon Diamond and Pearl. Hope this helped:)
the best ones are the chesto, oran, wiki, razz, pamtre, and ganlon. that is all i know at the moment. ill update when i find out more.
There is only one berry house throughout the whole of Pokemon diamond/pearl but there is a flower shop where you can get free berries in floaroma town.