Memories
Memories are Items that can be used to change Silvally's forme and type. There are 17 sorts of Memories: 1 for every type, except the Normal type.
Use
Memories act like Forme-Change Items. When held by a Silvally, Silvally temporarily changes its forms to match the Memory's type. When Silvally is not holding a Memory, it reverts back to its Normal Forme.
Obtaining Memories
After obtaining a Type: Null, Memories can be obtained at the Aether House. ???