A Memory, also known as Memory Disc or Memory Drive is an object introduced in the Pokémon Sun and Moon games in Generation VII. It is used to help Silvally and its Multi Attack move change into any one of the 18 types through its RKS System ability.
Info
Games
Sun and Moon
From Gladion after recieving Type: Null at the Aether Paradise along with every other memories.
Ultra Sun and Ultra Moon
From Wicke after recieving Type: Null at Poni Wilds along after becoming champion along with every other Memory.
Gallery
Bug Disc
Dark Disc
Dragon Disc
Electric Disc
Fairy Disc
Fighting Disc
Fire Disc
Flying Disc
Ghost Disc
Grass Disc
Ground Disc
Ice Disc
Psychic Disc
Rock Disc
Steel Disc
Water Disc