Quick Powder and Metal Powder can both only be found as held items on wild Ditto. And you can only find wild Ditto in Mr. Backlot’s Trophy Garden on Route 212, which is just south of Hearthome City.
Acquiring Quick Powders & Metal Powders
You’ll find both the Quick and Metal Powders on wild Ditto, which are only located in the Trophy Garden behind the Pokémon Mansion on Route 212.
No Hidden Moves are required to reach this area. But you must have visited Pastoria City at least once before this area is open to you.
You will also need to get Mr. Backlot to name Ditto specifically before it will appear (we’ll cover this in the next section).
Where To Find the Pokémon Mansion
Assuming you’ve visited Pastoria City, the quickest way to reach the Pokémon Mansion is to start at the Hearthome City Pokémon Center and head south.
When you reach the white picket fences to the south, head eastward.
Take the south turn by the fisherman NPC standing in the middle of the street’s intersection, then turn west at the Hearthome City sign.
Travel westward until you reach the two city gates in the southwest corner of town.
Take the one to the south — this will put you on Route 212.
Just pass through the gate and continue southward on Route 212.
Continue moving south, hugging the eastern edge when trees start to break up the path.
Circle around the ponds you encounter along the way but keep going south.
Head south when the bushes begin to resemble a sort of hedge maze, and eventually you will see the Pokémon Mansion’s gilded front gates and statues.
Go around the gates and head up through the front gates to reach the mansion.
Then you can head inside once you reach the front doors.
Inside the mansion, take a right to enter the eastern corridor.
Enter the first room to the north, which is Mr. Backlot’s office.
Tip: Save the game before you do anything else.
Finding Wild Ditto
Inside this room you will find Mr. Backlot standing next to his butler.
If you speak to Mr. Backlot, he will go on a long self-congratulating speech about the rare Pokémon he has in the Trophy Garden. Act impressed to keep him talking.
Eventually Mr. Backlot will mention the latest rare Pokémon that he allegedly saw in the Trophy Garden. The Pokémon he mentions is random and changes once every 24 hours.
However, if you soft reset the game and speak to Mr. Backlot again, you can force the specified Pokémon to change to a different one.
Repeat the soft reset process until Backlot mentions Ditto.
Mr. Backlot’s butler will then inform him that Ditto aren’t actually in the Trophy Garden. After a quick discussion between the two, the butler will leave the room.
Mr. Backlot will then continue lying in an attempt to save face.
At this point, the butler will have already snuck out and released wild Ditto into the Trophy Garden under Backlot’s orders.
Leave the room and head westward back into the main hall, then turn north and leave the Pokémon Mansion through the back exit.
Enter the Trophy Garden and search through the tall grass until you find a wild Ditto.
This may take a while, since each random encounter only has a 5% chance of being the Pokémon Mr. Backlot bragged about.
Farming Ditto for Held Items
Every wild Ditto has a 50% chance of holding a Quick Powder, but only a 5% chance of holding a Metal Powder.
But you can speed up the process of acquiring both Powders by bringing a designated item-farming team with you.
These special teams use Pokémon with the Abilities Frisk and Compoundeyes to increase the odds of finding items, and to identify any item held by a wild Pokémon.
If you’re using an item-farming team, the Compoundeyes Ability will raise the odds of a Ditto carrying Quick Powders and Metal Powders to 60% and 20%, respectively.
Once you’ve stolen a held item you can end the battle however you prefer—you will keep the item even if you flee.
Quick/Metal Powder Details and Uses
When a Ditto holds a Quick Powder, the Ditto’s Speed stat doubles, as long as the Ditto isn’t transformed.
While this might seem like a useless item, it does have a purpose:
A Ditto with doubled Speed is more likely to move first and transform before the opponent can attack.
When the opponent’s attack lands, Ditto will be the same type as the attacker and potentially take less damage as a result (depending on the move used).
The Metal Powder acts much like the Quick Powder, except it’s Ditto’s Defense stat that gets doubled.
Metal Powder, though the rarer of the two, is arguably less useful than the Quick Powder.
This is because it only lessens the damage from physical attacks. Special attacks will still do the same amount of damage regardless.