Even though each Pokemon is different in its own way, some things can only be used with certain Pokemon.
Because there are so many different kinds of Pokemon, it can be hard for any one of them to stand out. Game Freak, on the other hand, does give some Pokemon special tools, like new forms, higher stats, or moves and skills that are unique to them.
Signature moves and skills are often hard to forget and play a big role in how useful a Pokemon is. Signature items can also help a Pokemon stand out. Most held things in the game can be used by any Pokemon, but there are a few items that only work when given to the Pokemon they were made for.
Pikachu – Light Ball

Pikachu is the series’ mascot, so it’s not strange that he gets a lot of special treatment. But unlike Z-Moves and Gigamax forms, Pikachu’s special item isn’t as flashy and can be easy to forget.
The Light Ball has a 5% chance of being found on a wild Pikachu. It boosts the attack and special attack of any Pikachu, making it as strong as its advanced form, Raichu. When a Pikachu holds it during breeding, the resulting Pichu will know the move Volt Tackle.
Ditto – Quick Powder/Metal Powder

Ditto is a Pokemon that has always been interesting. It’s not very strong and doesn’t stand out, but it can change into a copy of its opponent. This lets Ditto match them up based on their stats and moves, making it fair.
But Ditto has two things that always give it the upper hand. Quick Powder makes it move faster, and Metal Powder makes it better at defense. If Ditto uses either of these, it will always have the upper hand against any opponent it has copied, even if they have items.
Cubone/Marowak – Thick Club

The bone clubs they carry are one of the most well-known things about the Cubone line. But they can get the Thick Club as an item in the game. When Cubone or Marowak hold this item, their attack stat goes up by two.
This is also true for Alolan Marowak, which made the best use of the item because it was a pretty strong Pokemon when it was released in Pokemon Sun&Moon. Even though they look like clubs, there is only a 5% chance that a wild member of this family will hold a Thick Club.
Farfetch’d – Leek

Farfetch’d is a Pokemon that has stayed famous even though it doesn’t have many good qualities. It’s not very strong and doesn’t stand out, but the Leek is a special item. This item helps Farfetch’d because it makes its moves more likely to score a key hit.
Since this item is so weak, it couldn’t really make Farfetch’d useful in higher level fights, but in Pokemon Sword&Shield, it got a new job. Alolan Farfetch’d needs three critical hits in a single fight to evolve into Sirfetch’d. Getting a Leek is almost the only way to get a Sirfetch’d.
Latias/Latios – Soul Dew

Latias and Latios, also called the “Lati twins,” are two legendary Pokemon that were introduced in Pokemon Ruby and Sapphire. Their looks, stats, and moves are all very identical. Soul Dew is a unique thing that the twins share, which is only right.
Before, the Soul Dew increased their special attack and special defense by 50%. This made it so strong that it couldn’t be used in some 8 Ball Pool game challenges. But that’s no longer the case in Pokemon Sun and Moon. Now, it just makes their mental and dragon-type moves 20% stronger, which isn’t as strong as before.
Dialga/Palkia/Giratina – Specific Orb’s

Because of how they are related in the story, the three Sinnoh area box art legendaries look a lot alike. One is that they all have something called a “orb” that is unique to them.
The Adamant Orb helps Dialga’s dragon and steel type moves, the Lustrous Orb helps Palkia’s dragon and water type moves, and the Griseous Orb helps Giratina’s dragon and ghost type moves. The Griseous Orb also gives Giratina the ability to change back to its original form.
Clamperl – Deep Sea Scale And Tooth

There are a lot of Pokemon that can’t change until they get certain things. But most of the time, these things have no other use as held items. Clamperl is one of the few rare cases. Holding the Deep Sea Tooth doubles its special attack, and holding the Deep Sea Scale doubles its special defense.
Even though these things give Clamperl big boosts, it’s not a very interesting Pokemon, so there aren’t many ways to use them in battle. The main thing they do is change Clamperl into Huntail and Gorebyss.
Genesect – Drives

Genesect has four unique things, which is more than Clamperl and Ditto, which only have two. These drives are called Shock, Burn, Chill, and Douse. They come in boxes that can be put into Genesect’s artificial body.
As their names suggest, the drives are electric, fire, ice, and water, in that order. They let Genesect change the type of its signature move, Techno Blast, to match the type of the inserted drive. This gives it a lot of options in battle and gives it a lot of coverage.
Silvally- Memories

Silvally has 17 unique’memory’ things, which is even more than Genesect. Like Genesect, these items come in different types that change how its defining move, Multi-Attack, works.
But, unlike Genesect, the memory items also change Silvally’s type to match the type of the item, so it can be any type in the game. The same thing happens with this as with Arceus and the ‘plate’ items. But any Pokemon can use Arceus’s plates, while Silvally is the only one who can use its memories.