The Tyranitarite (Japanese: バンギラスナイト Bangirasnite) is a type of held item introduced in Generation VI. It is a Mega Stone associated with Tyranitar.
If held by an Tyranitar, allows it to Mega Evolve into Mega Tyranitar if its Trainer has a Key Stone. Each Trainer can only Mega Evolve one Pokémon per battle.
Unaffected by item negating effects (such as Embargo and Klutz). Item manipulating effects (such as Trick and Fling) cannot give Tyranitar a Tyranitarite or remove a Tyranitarite from Tyranitar.
If held by an Tyranitar, allows it to Mega Evolve into Mega Tyranitar when it performs a Spectacular Talent during a Pokémon Contest Spectacular while its Trainer has a Key Stone. Tyranitar will remain a Mega Tyranitar until the Talent Round ends.