no you can get it form bebe who lives in hearthome city next to the Pokemon center or in the trophy garden south of hearthome after you talk to the mansion owner.(after you get national dex)
you can also breed with a ditto to get eevee eeg
plus you can trade from a friend or the world trade center
Yes
You can't, because Pokemon black was made after Pokemon diamond, Pokemon diamond wouldn't be able to recognise any of the new Pokemon. So to solve this problem they stopped all trading from black to any other game apart from white. You can however get your Pokemon from diamond to black by using the poke transfer, yet you need to have won the league for the first time to be able to do this.
there are 59 more Pokemon but i don't know which ones apart from palkia, girantina, rotom and shaymin sky forme.
You can't get Swablu in Sinnoh, apart from in the Battle Area, Resort Area, Survival Area etc.
no ledgendary can breed (apart from manaphy to get phione)
if you want more Pokemon yes because different Pokemon appear in each game apart from dialga and palkia
you can cheat and only get the last badge but apart from that you can only use waterfall as a move in a battle . you have to have the last badge
From what i know you have to beat the elite four and and team plasma's N and ghestis in their castle then N will blaber on about becoming a good person bla bla bla then the credits will roll. THEN you will be able to use the poketransfer lab on route 15 to transfer Pokemon from any of the old games apart from the gba's of course you have to migrate them to diamond or pearl then you can transfer them black or white.
the ledendary pokemon availible in Pokemon Diamond are: Dialga Arceus Shamin Darkrai Cressilia Groundon Kyroge Rayquaza Zapdos Moltres Articuno Giritina Palkia NOTE: Most of these pokemon are not in the actual game plot apart from Dialga and the rest are event pokemon and from other games and these can NOT be obtained without an AR or R4 card. (Unless you went to the event) or have any other pokemon games and have them on that. (To trade them over you will need both cards and 2 DS's) Hope This Helped :).
They are both good but.... i have Pearl and my friend has Diamond. He says Diamond is better becuase, Dialga is Steel and Dragon which is stronger than Water and Dragon for Palkia. so i guess Diamond is a little better than Pearl. But pearl is good too :]]Actually i did some research and Water is better then steel because Steel can mold from water. that makes Palkia better then Diagla. But Diagla is more powerful. i have Diamond and Pearl and i beat Pearl all ready im working on Diamond.
Basil plants should be spaced about 12 to 18 inches apart in a garden for optimal growth and development.
they look different