About Pokemon Black & White how do you get All the Items from Gen. 4 to 5?

Question

I Know how to Migrate Pokemon but just 2 Last Questions Remains(this is 1 of them) but the real Question is how do you even get the Gen. 4 Items to the 5th.

I know this is somewhat a Stupid Question but All that I Wonder then I started to think a long time after I have learned how to Defeat Marriland's Rattata & Migrate PKMN, but there was a Catch you needed to take off Items on your PKMN.

Then finnaly this Question came up I've notice that that there were almost none of the 1st,2nd,3rd, or 4th Gen. Items, then I Remember Giratina's Origion Form, Shaymin's Sky Form, and Arceus Multiform they Three needed sertain Items that Gen. 5 don't have.

Solution: How/Where do you get all Gen. 1-4 Items?

Answer 1

Most of the items will be found in game. some but few may require dream world. check: http://www.serebii.net/blackwhite/items.shtml
it will show you where to get most if not all items