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.

Diancite, the mega stone for Diancie, cannot currently be obtained through normal gameplay in Pokémon Insurgence version 1.0, as it has unobtainable requirements. It can, however, be obtained during certain Challenge Modes.

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 Poké.
Description One variety of the mysterious Mega Stones. Have Amphaors 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 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 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.

Flygonite   ITEMS pocket							Cannot be bought Cannot be sold
Effect: Allows Flygon to Mega Evolve into Mega Flygon when held during battle.					Locations Mystery Gift
Description One variety of the mysterious Mega Stones. Have Flygon 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.

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.

Trivia

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