If held by a Manectric, the Manectite allows it to Mega Evolve into Mega Manectric if its Trainer has a Key Stone. A Trainer can only Mega Evolve one Pokémon per battle (or only have one Mega-Evolved Pokémon at any given momentZA).
As a Mega Stone, it is unaffected by item-negating effects (such as Embargo and Klutz). Item-manipulating effects (such as Trick and Fling) cannot give or remove a Manectite from Manectric.
Outside of battle
If held by a Manectric, the Manectite allows it to Mega Evolve into Mega Manectric when it performs a Spectacular Talent during a Pokémon Contest Spectacular if its Trainer has a Key Stone. Manectric will remain a Mega Manectric until the Talent Round ends.
A Manectite first appeared in Fast-Thinking Froakie, where Clemont helped X and his friends find it at Route 5. Unfortunately, a Team Flare Grunt tasked in collecting Mega Stones had also found the stone, and escaped with it. X, Trevor, and a Manectric, who had gotten the group into searching the stone to begin with, chased the Grunt to Parfum Palace, where they eventually managed to get the stone back. The Manectric, which had joined X's party with the nickname "Élec" during the chase, subsequently used the stone to Mega Evolve and send the Grunt running away. Élec would then start wearing the Manectite in his mane, allowing him to Mega Evolve whenever it is necessary.
Merchandise
The Manectite has been featured in several officially licensed merchandise.
Mega Ring System Manectite
Manectric, Mega Manectric & Manectite metal charm set
