Notes:

When Type: Null finds a trainer it trusts, it destroys its helmet and evolves into Silvadi. It has a special item called Memory that lets it be one of all 18 types at any one time thanks to its ability, AR System. It's not currently known if it's one item that can change this, or if there are 18 different ones. It has a new attack called Multi Attack which changes type based on its hold item