they usally trade Pokemon like chatot and weak ones too nothing you cant catch in the wild
i will trade someone a phione or manaphy or arceus or something for a good shiny Pokemon
4.
No not every pokemon. You can't catch the starter Pokemon and many of the rare pokemon, you have to trade with Diamond. sorry ...
You can but not many
some people have them although they are from Nintendo events and would probably only trade them for a high level, other Nintendo event Pokemon, or a shiny Pokemon.
As many as you want!
To get a Glameow in Pokemon Diamond and Pearl you should connect with global trade. About half a year ago I Traded hundreds of glameows so their should be many glameows because of my glameow's offspring.
There is only one region in Pokemon diamond.
there is only the sinnon region is Pokemon diamond
i can trade you many lugias on pearl or diamond
Ash has 6 Pokemon in Diamond version
493 are in diamond
I believe you have to have six Pokemon chosen to migrate them to pal park in Pearl. If you don't have six Pokemon you want to migrate, then catch however many Pokemon you can trade.