u can't...
sad, right???
You can get a Cyndaquil without trading only by transfering it from a GBA Pokemon Game onto your Pokemon Diamond Version.
You can only get pokemon if you have a diamond, pearl, heartgold, or soulsilver game. Otherwise you have to use a rental pass.
i would try the two methods recommended for getting a black charizard on diamond but if you do not have an emerald game or a diamond game then i have no answer
You mean Dialga?
Trade it using the GTS.
No.......sorry
you cant sorry
You can buy the game Preloaded with all 493 Pokemon at: www.losttreasuresonline.com
by getting fossils from underground and going to the orgberth mueseum.
Manaphy is not originally in Pokemon Diamond. In order to obtain it (without an action replay) you must play all the way through the game Pokemon Ranger. In the last (extra) mission of the game you can acquire the manaphy egg and then send it over to Pokemon diamond.
You could migrate it from another GBA game, but otherwise it is impossible without the Emerald Cartridge.
You can use an action replay.