List of type-enhancing items in Pokémon

General

Adamant Orb and Crystal

The Adamant Orb is an item which raises the power of Dialga's moves. In Diamond/Pearl, it is found at Spear Pillar, and in Platinum, it is found at Mt. Coronet. However, starting with Pokémon Legends: Arceus, Dialga change to its Origin Forme using the Adamant Crystal.

Black Belt

Black Belts are items in the Pokémon series. It raises the power of Fighting type moves when it's held. In Pokémon Platinum, the player obtains it by talking to a man on Route 221.

Black Glasses

A shady-looking pair of sunglasses. Not only are they incredibly cool, but they trick the wearer's brain into thinking it's nighttime, boosting the power of Dark type moves by 20%.

Charcoal

Charcoal raises the power of Fire type moves by 20% when held by a Pokémon. It is a piece of burned wood used as kindling for starting fires. Fire type Pokémon occasionally snack on charcoal in order to remove impurities from their bodies and make their internal flames burn stronger.

Griseous Orb and Core

The Griseous Orb is the Orb that enables Giratina to be in Origin Forme, outside of the Distorition World. However, starting with Pokémon Legends: Arceus, Giratina change to its Origin Forme using the Griseous Core instead. The Griseous Orb only the effect of boosting the power of Dragon- and Ghost-type moves by 20% as of Pokémon Scarlet and Violet.

Hard Stone

Hard Stone are items found in the Pokémon video game series. They increase the power of Rock-type attacks when held.

Lustrous Orb and Globe

Lustrous Orb is Pokémon item that increases the power of Palkia's moves. However, starting with Pokémon Legends: Arceus, Palkia change to its Origin Forme using the Lustrous Globe.

Metal Coat

Metal Coat is a Pokémon item that evolves Scyther into Scizor when traded and Onix into Steelix when traded.

Miracle Seed

The Miracle Seed when held by a Pokémon increases the power of the holder's Grass moves by 10% in earlier games, In Generation IV it increases them by 20%. Available at some Pokémarts for a cost of 100. When flung inflicts regular damage with 30 power.

Gems

Fire Gem

An orange, diamond-cut gemstone made of crystalized Fire energy. When held by a Pokémon, it will boost the power of a Fire type move by 50% once during battle.