Gem

Gems (Japanese: ジュエル Jewel) are one-use type-enhancing items introduced in Generation V. There are 18 types of gems, corresponding to each of the 18 types. A gem is consumed when the Pokémon holding it uses a damaging attack that matches the gem's type, and the attack's power is boosted by 30% (50% prior to Generation VI). The gem will not be consumed if the attack misses or fails. ,, and damaging consume the gem immediately before dealing damage.

If the type of a move is changed with, , , , or , the gem must match the type of the move after it has been modified. will only consume a gem if the called move is of the appropriate type for the gem. and can consume gems, but only if the type of the gem matches the type of damage that will be dealt. and can consume Normal Gems, but will be Normal-type for that execution even if the Pokémon is given a Plate or Drive by  upon consuming the gem. If a Pokémon consumes a gem for an attack and is immediately given another of the same gem by Symbiosis, that gem will not be consumed for that attack; if a Pokémon consumes a Power Herb using a damaging move and is immediately given a gem of the appropriate type, that gem will be consumed for that attack. Fixed-damage moves (such as, and ) will consume gems but will not have their damage modified. consumes a gem even if it heals the target, but the amount healed is unaffected. will fail if the user is holding a gem. ,, , and will never consume a gem.

In Generation VI, a Fairy Gem was created to correspond with the new Fairy type; in spite of this, the Normal Gem is the only gem obtainable in Generation VI and Generation VII games.

Artwork
This is artwork of the gems as seen on the Pokémon Global Link.

In the anime
A Dragon Gem appeared in A Connoisseur's Revenge!, where it was offered to and her  by a Poké Mart clerk.

A Fire Gem appeared in Climbing the Tower of Success! as one of the search items for the Wishing Bell Festival scavenger hunt.

In other languages
Juwelen Gema Joyau Bijou ジュエル 宝石