Fairy Gem appears in 5 version groups since Generation VI, a Jewels item in the Items pocket
PokéAPI item 731 of 2,223, Jewels category, Items pocket
Effect, in PokéAPI's words
Fairy Gem: “Held: When the holder uses a damaging Fairy move, the move has 1.5× power and this item is consumed.”
Games
Fairy Gem is listed in the text of 5 version groups, first in Generation VI
Game index by generation
IIIIIIIVVVIVIIVIIIIX
Named in
X and YSun and MoonUltra Sun and Ultra MoonLet's Go Pikachu and Let's Go EeveeSword and Shield