Along with a New generation of Pokemon comes a number of new items as well. Most of these items, however, are simply the new Z-Crystals for Z-Moves. And many of the others are yet new Key Items.
New Items:
Adrenaline Orb
Aloraichium Z
Beast Ball
Big Malasada
Bottle Cap
Buginium Z
Darkinium Z
Decidium Z
Dragonium Z
Eevium Z
Electric Seed
Electrium Z
Enigmatic Card
Fairium Z
Festival Ticket
Fightinium Z
Fishing Rod
Flyinium Z
Forage Bag
Gold Bottle Cap
Grassy Seed
Groundium Z
Ice Stone
IciumZ
Incinium Z
Marshadium Z
Mewnium Z
Misty Seed
Moon Flute
Pikanium Z
Pikashunium Z
Pink Nectar
Poisonium Z
Primarium Z
Professor's Mask
Protective Pads
Psychic Seed
Psychium Z
Purple Nectar
Red Nectar
Ride Pager
Rockium Z
Snorlium Z
Sparkling Stone
Sun Flute
Tapunium Z
Terrain Extender
Yellow Nectar
Z-Ring
Zygarde Cube