If held by an Alakazam (or is present in the player's Bag)PE, allows it to Mega Evolve into Mega Alakazam 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 Alakazam an Alakazite or remove an Alakazite from Alakazam.
Outside of battle
If held by an Alakazam, allows it to Mega Evolve into Mega Alakazam when it performs a Spectacular Talent during a Pokémon Contest Spectacular while its Trainer has a Key Stone. Alakazam will remain a Mega Alakazam until the Talent Round ends.
In Pokémon Shuffle, the Alakazite allows the player to Mega EvolveAlakazam when the mega meter gauge is full with Alakazam in the first spot.
The player can obtain the Alakazite by completing the Competitive Stage available in Week 11 of the event rotation.
The Alakazite was also available as a prize during the Mega Alakazam Competitive Stage. This Competitive Stage ran on both the Nintendo 3DS and Mobile versions from September 13 to 20, 2016; and September 12 to 19, 2017.
The Alakazite enables the following Mega Evolution:
An Alakazite belonging to a Trainer appeared in Mega Evolution Special IV, during the ten-battle gauntlet Lysandre had arranged for Alain's training. The Alakazite was attached to the Alakazam's right spoon.