If anybody was wondering about those item codes, you can literally get most items in the game and then multiply those by 990.
Step 1: Find a high level Pokémon that knows the move Thief or Covet.
Step 2: Use the "Encounter Item" codes on whichever item you'd like.
(To do this, you would need to edit the .txt file for whichever game and put in the items that you want to be encountered)
For example, if you want a wild Pokémon to be carrying a Auspicious Armor, this is how you would set up the code
[Encounter Item Auspicious Armor]
04000000 03075538 00000928
Really, you just need the item codes which can be found on the first page of this thread and then just put in the 4 digit item code after the last line of this code right here:
[Encounter Item ---]
04000000 03075538 0000
You can fill in the lines (---) with the name of the item.
Also here are the codes for the Encounter Mod. These are also located in the files you can download at the beginning of this thread.
[Encounter Mod Off]
04000000 00D0A610 39402288
[Encounter Mod On]
04000000 00D0A610 148DABBC
04000000 03075500 18000181
04000000 03075504 790063E1
04000000 03075508 18000161
04000000 0307550C 790067E1
04000000 03075510 18000141
04000000 03075514 79006BE1
04000000 03075518 18000121
04000000 0307551C 3900DBE1
04000000 03075520 39402288
04000000 03075524 1772543C
04000000 03075530 00000085
04000000 03075534 00000000
04000000 03075538 00000000
04000000 0307553C 00000001
[Default Encounter]
04000000 03075500 D503201F
04000000 03075504 D503201F
04000000 03075508 D503201F
04000000 0307550C D503201F
Then, once you have all the codes loaded, you should be ready for the next step.
Step 3: Go back into the game with the codes loaded and run into a wild Pokémon while having your Pokémon that knows either Thief or Covet.
Step 4: Use Thief or Covet on the wild Pokémon.
I've noticed that this code makes every Pokémon level 1 so you should be able to take out almost anything. Thief works best for almost all Pokémon but covet doesn't work on Ghost types.
This way, the Pokémon will drop the item and you'll have it in your bag! Super nice that they fixed this.
Step 5: SAVE YOUR GAME!!! This will save you a lot of stress knowing that you've saved after you got the item.
Step 6: Turn on the "Items 990 When Use" code.
[07# Items 990 When Use]
040A0000 03075180 D2805461
040A0000 03075184 F2A040A1
040A0000 03075188 6B01029F
040A0000 0307518C 54000041
040A0000 03075190 52807BC8
040A0000 03075194 F90002C8
040A0000 03075198 D65F03C0
040A0000 00042D10 94C0C91C
[Inf Items When Use (off)]
040A0000 00042D10 F90002C8
Step 7: Go back into the game and head over to the nearest Poke Stop.
Step 8: Talk to the Market man in Blue and go to "I want to sell"
Step 9: Find the item you just got from the wild Pokémon and sell it to him. (This will multiply the item to 990)
Step 10: Repeat the same steps over and over to get all the items you could ever need!!! Also, SAVE AFTER EACH RELOAD!!!
We won't have anything until PkHex comes out so this is the safest and quickest method to getting all of the items.
NOTE: I haven't tried Key Items but I probably wouldn't because they would most likely break the game. Most Key Items are tagged to a flag which can literally break your entire game and you could lose everything. Also, you don't have to catch the Pokémon with the item although you can do so. Just don't trade those online because who knows when Nintendo is going to crack down the hammer on everybody.
PERSONAL OPINION (DON'T BE SALTY) In my opinion, editing saves will always be the safest way to get the best Pokémon regardless of what Nintendo will try to do. I've been banned in the past but the reason wasn't for save editing because I've been editing on a new Switch and it's been 2 years. All I can advise is always delete your wifi settings before hacking. This way, you'll never be online when you're using codes or save editing and Nintendo can never track you down. This is my opinion though so replies to this, understand that this is nothing personal and we're all here to have a good time.
I hope this helps and if anybody has a better method, please let me know!!!