Exchangeable item

An exchangeable item is a category of item which serves no in-game purpose aside from being able to be traded for another item or some sort of service. Though several Key Items fall under this category (such as Generation I and 's Bike Voucher), their exchange is often important to the story of the games, so they are not included here. These items are often also valuable items.

Shards
These items, also introduced in Generation III, come in different colors: red, blue, green, and yellow. They can be exchanged for the elemental evolutionary stones in, in groups of ten for the TMs containing weather-modifying moves in , and in groups of eight for special Move Tutor moves in. They can be found lying around in certain areas, held by certain Pokémon, or in the Underground of Sinnoh. They can also be traded in for certain Berries from s found in Violet City and Fuchsia City. In, Move Tutors found in , , , and will use Shards as payment (from two to twelve), although each Tutor requires only one kind of Shard.

Apricorns
These items are exclusive to Generation II and. There are several different colors, and they can be made into different Poké Balls by Kurt in Azalea Town.

Bottle Caps
These items were introduced in Generation VII along with Hyper Training. They can be exchanged to allow the player to raise a Pokémon's s through Hyper Training. They come in two colors that allow the player to raise either one or all of a Pokémon's IVs.

Underground
These are artwork of the items as seen in the Sinnoh Underground.

These are artwork of the items as seen in the Pokémon Dream World.

In the anime
In Defending the Homeland!, mentioned having used Big Mushrooms as a part of the new food he had just made for.

In Partner Promises, mentioned that the jewelry shop "Alola Sunrise" makes its jewelry from Heart Scales and  branches.

In Treasure Hunt, Akala Style!, during a Stoutland Search treasure hunt set up for and  by Olivia, Mallow found multiple Tiny and Big Mushrooms, while  found a Star Piece. In the dub, the Star Piece was incorrectly referred to as a Comet Shard.

In the Pokémon Adventures manga
A Big Mushroom appeared in A Week to Go and Old Wounds, where Shoko gave it to one of her to hold while demonstrating  her Marvelous Bridge Partrat Show.

Trivia

 * Heart Scales are the shed scales of.
 * The Move Reminder in accepts Mushrooms instead of Heart Scales, most probably due to the lack of  in Kanto and the Sevii Islands, as well as the abundance of  and.
 * Due to a mistake in the Nintendo Power Pokémon Diamond and Pearl guide, there was a rumor that the Shoal Salt functions like the Leftovers. However, multiple tests in-game have shown that the Shoal Salt does nothing; it is in fact the Shell Bell that functions similarly to Leftovers, itself created in Generation III from four Shoal Salts and four Shoal Shells.
 * In, the Heart Scale is incorrectly sorted in the Bag as an evolutionary stone when the bag is sorted by type, instead of as an exchangeable item.

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