Mega Stone

A Mega Stone is a type of held item that allows Pokémon to Mega Evolve.

Mechanics

During battle, the player can use their Key Stone-activating item, the Mega Ring to Mega Evolve a Pokémon before it attacks if it is holding the correct Mega Stone. Mega Stones only affect Pokémon during battles, and Pokémon will revert back to their basic form once the battle has ended or upon fainting. All Pokémon that can undergo Mega Evolution have an equivalent Mega Stone that is named after them, except for Rayquaza, which instead needs to know the move Dragon Ascent to Mega Evolve.

Mega Stones cannot be transferred to or from the correct holder during battle: Thief and Covet do not take the Mega Stone, Knock Off does not remove the Mega Stone, Trick and Switcheroo fail, Fling and Bestow fail, and Symbiosis does not activate. Embargo and Magic Room also cannot prevent the use of Mega Stones to Mega Evolve Pokémon. Mega Stones are not consumed upon use, but only one Pokémon can Mega Evolve per battle.

Availability

Mega Stones can be found numerous ways throughout the player's journey. Mega Stones are also sometimes found on the ground as a hidden item. Unlike the official games, they do not sparkle. Some can only being obtained through certain requirements like defeating a Gym Leader, or awarded by the Flag Guy in Secret Base for collecting 50 Flags.

List of Mega Stones

Altarianite   ITEMS pocket							Cannot be bought Cannot be sold
Effect: Allows Altaria to Mega Evolve into Mega Altaria when held during battle.					Locations Show East's Will to the lawyer in Koril Town
Description One variety of the mysterious Mega Stones. Have Altaria hold it, and this stone will enable it to Mega Evolve.

Ampharosite   ITEMS pocket							Cannot be bought Cannot be sold
Effect: Allows Ampharos to Mega Evolve into Mega Ampharos when held during battle.					Locations Surf to the Northwest and follow the trail in Murk Forest. Can be bought for 15000.
Description One variety of the mysterious Mega Stones. Have Ampharos hold it, and this stone will enable it to Mega Evolve.

Cacturnite   ITEMS pocket							Cannot be bought Cannot be sold
Effect: Allows Cacturne to Mega Evolve into Mega Cacturne when held during battle.					Locations Find Fighting-type guidebook in Utira Library and show it to a Black Belt
Description One variety of the mysterious Mega Stones. Have Cacturne hold it, and this stone will enable it to Mega Evolve.

Delta Bisharpite   ITEMS pocket							Cannot be bought Cannot be sold
Effect: Allows Delta Bisharp to Mega Evolve into Mega Delta Bisharp when held during battle.					Locations Use Tesseract in the Power Farm
Description One variety of the mysterious Mega Stones. Have Delta Bisharp hold it, and this stone will enable it to Mega Evolve.

Delta Blastoisinite   ITEMS pocket							Cannot be bought Cannot be sold
Effect: Allows Delta Blastoise to Mega Evolve into Mega Delta Blastoise when held during battle.					Locations Inside Perfection Base if you chose Delta Squirtle as your starter
Description One variety of the mysterious Mega Stones. Have Delta Blastoise hold it, and this stone will enable it to Mega Evolve.

Delta Charizardite   ITEMS pocket							Cannot be bought Cannot be sold
Effect: Allows Delta Charizard to Mega Evolve into Mega Delta Charizard when held during battle.					Locations Inside Perfection Base if you chose Delta Charmander as your starter
Description One variety of the mysterious Mega Stones. Have Delta Charizard hold it, and this stone will enable it to Mega Evolve.

Delta Galladite   ITEMS pocket							Cannot be bought Cannot be sold
Effect: Allows Delta Gallade to Mega Evolve into Mega Delta Gallade when held during battle.					Locations Whirl Islands on the bottom floor, left of where Audrey was fought (requires Tesseract).
Description One variety of the mysterious Mega Stones. Have Delta Gallade hold it, and this stone will enable it to Mega Evolve.

Delta Gardevoirite   ITEMS pocket							Cannot be bought Cannot be sold
Effect: Allows Delta Gardevoir to Mega Evolve into Mega Delta Gardevoir when held during battle.					Locations Whirl Islands on the bottom floor, right of where Audrey was fought (requires Tesseract).
Description One variety of the mysterious Mega Stones. Have Delta Gardevoir hold it, and this stone will enable it to Mega Evolve.

Delta Scizorite   ITEMS pocket							Cannot be bought Cannot be sold
Effect: Allows Delta Scizor to Mega Evolve into Mega Delta Scizor when held during battle.					Locations Talk to an Old Man on Route 6 with Delta Scizor in your party
Description One variety of the mysterious Mega Stones. Have Delta Scizor hold it, and this stone will enable it to Mega Evolve.

Delta Venusaurite   ITEMS pocket							Cannot be bought Cannot be sold
Effect: Allows Delta Venusaur to Mega Evolve into Mega Delta Venusaur when held during battle.					Locations Inside Perfection Base if you chose Delta Bulbasaur as your starter
Description One variety of the mysterious Mega Stones. Have Delta Venusaur hold it, and this stone will enable it to Mega Evolve.

Diancite   ITEMS pocket							Cannot be bought Cannot be sold
Effect: Allows Diancie to Mega Evolve into Mega Diancie when held during battle.					Locations Show the hiker inside the house to the right of the Pokémon center in Roggan Town any Legendary Pokémon
Description One variety of the mysterious Mega Stones. Have Diancie hold it, and this stone will enable it to Mega Evolve.

Eevite   ITEMS pocket							Cannot be bought Cannot be sold
Effect: Allows Eevee to Mega Evolve into Mega Eevee when held during battle.					Locations Inside Perfection Base if you chose Eevee as your starter
Secondary effect: If held by Eevee, it prevents evolution.
Description One variety of the mysterious Mega Stones. Have Eevee hold it, and this stone will enable it to Mega Evolve.

Feraligatite   ITEMS pocket							Cannot be bought Cannot be sold
Effect: Allows Feraligatr to Mega Evolve into Mega Feraligatr when held during battle.					Locations Use Dive at the end of Cyan Cavern
Description One variety of the mysterious Mega Stones. Have Feraligatr hold it, and this stone will enable it to Mega Evolve.

Flygonite   ITEMS pocket							Cannot be bought Cannot be sold
Effect: Allows Flygon to Mega Evolve into Mega Flygon when held during battle.					Locations Previous Mystery Gift
Description One variety of the mysterious Mega Stones. Have Flygon hold it, and this stone will enable it to Mega Evolve.

Gengarite   ITEMS pocket							Cannot be bought Cannot be sold
Effect: Allows Gengar to Mega Evolve into Mega Gengar when held during battle.					Locations Use Tesseract in Abandoned Wing of Utira Library.
Description One variety of the mysterious Mega Stones. Have Gengar hold it, and this stone will enable it to Mega Evolve.

Girafarigite   ITEMS pocket							Cannot be bought Cannot be sold
Effect: Allows Girafarig to Mega Evolve into Mega Girafarig when held during battle.					Locations Low chance to obtain from Poképon in Sonata City
Description One variety of the mysterious Mega Stones. Have Girafarig hold it, and this stone will enable it to Mega Evolve.

Gothitite   ITEMS pocket							Cannot be bought Cannot be sold
Effect: Allows Gothitelle to Mega Evolve into Mega Gothitelle when held during battle.					Locations Use Tesseract where you fought Diana in the Selene Gym
Description One variety of the mysterious Mega Stones. Have Gothitelle hold it, and this stone will enable it to Mega Evolve.

Marowite   ITEMS pocket							Cannot be bought Cannot be sold
Effect: Allows Marowak to Mega Evolve into Mega Marowak when held during battle.					Locations Have a Marowak in your team and speak to the guitarist outside a house in Selene City
Description One variety of the mysterious Mega Stones. Have Marowak hold it, and this stone will enable it to Mega Evolve.

Pidgeotite   ITEMS pocket							Cannot be bought Cannot be sold
Effect: Allows Pidgeot to Mega Evolve into Mega Pidgeot when held during battle.					Locations Talk to Xavier in Helios City after obtaining the Summit Badge
Description One variety of the mysterious Mega Stones. Have Pidgeot hold it, and this stone will enable it to Mega Evolve.

Sablenite   ITEMS pocket							Cannot be bought Cannot be sold
Effect: Allows Sableye to Mega Evolve into Mega Sableye when held during battle.					Locations Use Tesseract in the Helios Sewers
Description One variety of the mysterious Mega Stones. Have Sableye hold it, and this stone will enable it to Mega Evolve.

Salamencite   ITEMS pocket							Cannot be bought Cannot be sold
Effect: Allows Salamence to Mega Evolve into Mega Salamence when held during battle.					Locations Use Tesseract in the top of Jade Tower
Description One variety of the mysterious Mega Stones. Have Salamence hold it, and this stone will enable it to Mega Evolve.

Shiftrite   ITEMS pocket							Cannot be bought Cannot be sold
Effect: Allows Shiftry to Mega Evolve into Mega Shiftry when held during battle.					Locations Previous Mystery Gift
Description One variety of the mysterious Mega Stones. Have Shiftry hold it, and this stone will enable it to Mega Evolve.

Spiritombite   ITEMS pocket							Cannot be bought Cannot be sold
Effect: Allows Spiritomb to Mega Evolve into Mega Spiritomb when held during battle.					Locations Talk to the Flag Guy in any Secret Base after collecting 100 Friend Safari flags
Description One variety of the mysterious Mega Stones. Have Spiritomb hold it, and this stone will enable it to Mega Evolve.

Stunfiskite   ITEMS pocket							Cannot be bought Cannot be sold
Effect: Allows Stunfisk to Mega Evolve into Mega Stunfisk when held during battle.					Locations Talk to the Flag Guy in any Secret Base after collecting 50 Friend Safari flags
Description One variety of the mysterious Mega Stones. Have Stunfisk hold it, and this stone will enable it to Mega Evolve.

Typhlosionite   ITEMS pocket							Cannot be bought Cannot be sold
Effect: Allows Typhlosion to Mega Evolve into Mega Typhlosion when held during battle.					Locations Trade a Druddigon for a Cyndaquil in Sonata City
Description One variety of the mysterious Mega Stones. Have Typhlosion hold it, and this stone will enable it to Mega Evolve.

Tyranitarite   ITEMS pocket							Cannot be bought Cannot be sold
Effect: Allows Tyranitar to Mega Evolve into Mega Tyranitar when held during battle.					Locations Hidden item near the Ruin Maniac in the Rezzai Desert.
Description One variety of the mysterious Mega Stones. Have Tyranitar hold it, and this stone will enable it to Mega Evolve.

Zoronite   ITEMS pocket							Cannot be bought Cannot be sold
Effect: Allows Zoroark to Mega Evolve into Mega Zoroark when held during battle.					Locations Mystery Gift, held by Zorua
Description One variety of the mysterious Mega Stones. Have Zoroark hold it, and this stone will enable it to Mega Evolve.

Trivia

• The design of the Mega Stones appear to be based on a common pattern found in the glass marble called a toothpaste marble.