| Pokemon and Item Cloning:
Select the pokemon that you want to clone. Give it any items needed too. Put it in any of your boxes. Now, go to the GTS. Talk to the lady and enter. Put up a pokemon for trade (NOTE: Try this with a low-level pokemon who doesn't have an important item first). When it takes you to the loading screen, watch the little clock on the bottom-right part of the screen. Count how many times it hits the top, and note where it was when the pokemon was uploaded. Go back to the summary screen, and take out the pokemon. Once again, watch the clock. Most people's clock stops moving between 7.5 and 8 rotations.
Now, put the pokemon that you want to duplicate up for trade. Right before the clock gets to the interval where it changes, turn off the DS. Turn it back on, and load the game. You will probably get the error screen, but don't worry. Continue to load the game, and go back to the GTS. If you performed the glitch correctly, the pokemon will still be up for trade. Take it back, and leave. Now, go to the PC to the left of the counter. Load it up, and check your boxes. If you performed the glitch right, you will have duplicates of the pokemon (and possibly item) that you tried to clone.
If you didn't get it, try, try again. It took me about 13 times to get it. Just keep trying.
NOTE: This glitch is very risky. Several GameFAQs members have reported it to screw up their game. Several other members reported their pokemon being traded before they could get back to it. Though the number is very small (about 3/100 people), it still is a risk. Don't say you haven't been warned. To prevent the second problem from happening, request an evolved pokemon that is level 9 or lower (eg. Infernape).
After you beat the elite four, go to Canalave City and go in the house with a sign next to it. Talk to the boy in the bed, then talk to the woman. After you talk to the boy and woman exit the house and talk to the sailor that sails you to Iron island. He will ask you to go to Full Moon Island to get a wing to heal his son. Say yes to him. He will sail you there. Now walk up and to the left is the wing to heal his son get it. Dont leave yet, go to the right and then go up you will then see Cresselia go up to it and it runs away like Mesprit. Now go talk to the sailor and sail back to Canalave. When you get back you will follow him into his house and use the wing on his son. His son will then wake up and talk about a nightmare. You can now resume your adventure and look for Cresselia. You are going to need the pokemon marketing app to find Cresselia.
Good Fishing rod:
The good rod is on route 209. Talk to a fisherman, say yes and he will give you a good rod.
This is how to obtain the Mystery Gift in Pokemon Diamond. It is different from the previous games, so pay attention.
1) Go to the Jubilife TV station, located in Jubilife City.
2) Go to the 3rd floor.
3) Talk to the man on the left in the lower room.
4) When he asks you to tell him some words, you tell himll him are "everyone" and "happy".
5) He will then ask you for a second set of words. Tell him "Wi-Fi" and "Connection". This will then unlock the Mystery Gift feature on the main menu.
When you go into it you can recieve your gift 3 ways:
-Wi-fi While you won't get a gift from this cheat, just get the option to receive it, but when Pokemon/Gamefreak announces when the mystery event will be, go to "Wi-Fi" and ,if you are lucky, you might receive a mystery gift. This can include rare items, such as the ones needed to get to Arceus, Darkrai, and Shaymin.
When you are walking your pokemon in Amity Square, you can turn around and talk to your pokemon. Every 200 steps talk to your pokemon and it will be holding an item or an item for your fashion case.
When you have another Pokemon game cartridge inserted into the GBA slot of your Nintendo DS, new Pokemon will appear AFTER YOU HAVE OBTAINED THE NATIONAL DEX. Below are the games that you can plug in, what Pokemon you will get, and where they will be. When you take the cartridge out, those unique Pokemon will disappear. These Pokemon appear in the wild and you must use the Pokeradar to find.
Seedot Eterna Forest, Route 203, Route 204 Nuzleaf Route 229 Mawile Iron Island Zangoose Route 208 Solrock Lake Acuity, Lake Acuity Surroundings, Lake Verity, Lake Valor, Mt. Coronret, Spring Path, Turnback Cave
Lotad Route 203, 204, 205 North, 212 South Lombre Route 212 South, 229 Sableye Iron Island Seviper Route 208 Lunatone Lake Acuity, Lake Acuity Surroundings, Lake Verity, Lake Valor, Mt. Coronet, Spring Path, Turnback Cave
Pineco Eterna Forest, Route 203, 204, 229 Gligar Hard Mountain, Route 206, 207, 214, 215, 227 Shuckle Route 224 Teddiursa Route 211, Lake Valor Ursaring Lake Valor, Route 216, 217
Caterpie Route 204 South, Metapod Eterna Forest, Ekans Route 212 South, Arbok Great Marsh, Growlithe Route 201, 202, Elekid Route 204 South, Valley Windworks
Weedle Route 204 South, Kakuna Eterna Forest, Sandshrew Lost Cave, Sandslash Route 228, Vulpix Route 209, Magby Hard Mountain, Route 227
Any Pokemon GBA Cartridge:
Haunter Eterna Forest Mansion, Gengar Eterna Forest Mansion Room with eyes