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Here are a few details on some of a new mechanic
- Zvolution (Z- Evolution). There are no new Mega evolutions this time around but there are new Megastones. Confusing isn't it. Basically there is a Greninjanite Z which is explained to be accidentally made by Zygarde when releasing its power. Greninjanite Z actually has no effect on the Pokemon that holds it. You need to Breed 2 Greninja's with 1 holding Greninjanite Z and the egg will hatch with the "Z-Gene". This allows them to access a new form like mega evolution but different and based in friendship. Mega Z Stones are extremely rare and hard to find in game and rarely (About as rare as finding a Shiny) a Pokemon can be found in the wild with the "Z-Gene". Pokemon that go through this process have a part of them changed to match the appearance of the trainer (Black on the face when a player has a black hat, etc) and an emphasized move for example Crobat has huge glowing fangs while Greninja has its Water Shuriken. These Pokemon also have special Z-Moves. Here are a few Pokemon that can go through the process... Johto, Unova, and Kalos starters, Flygon, Milotic, Crobat, Dragonite, and a few others
