In the core series games
If held by a Glalie, allows it to Mega Evolve into Mega Glalie 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 Glalie a Glalitite or remove a Glalitite from Glalie.
Outside of battle
If held by a Glalie, allows it to Mega Evolve into Mega Glalie when it performs a Spectacular Talent during a Pokémon Contest Spectacular while its Trainer has a Key Stone. Glalie will remain a Mega Glalie until the Talent Round ends.
Pokémon holding Glalitite in Pokémon Omega Ruby and Alpha Sapphire cannot be traded to Pokémon X and Y.
|One of a variety of mysterious Mega Stones. Have Glalie hold it, and this stone will enable it to Mega Evolve during battle.
In spin-off games
In other languages