First topic message reminder :
Early this morning, a new form of evolution was released. The process, called Mega Evolution, but the Pokemon Blazekin, Mawile, Lucario, Absol, Ampharos, and Mewtwo are shown to be able to use it. This explains why Mewtwo was able to transform into it's new form.
This is surely groundbreaking news. It can be speculated that an item is needed to push this new Mega Evolution, making the Pokemon more Powerful. It was also revealed in the leak the following information:
MegaBlazekin gets the ability Speed Boost.
MegaLucario gets the ability Adaptability.
MegaMawile gets the ability Huge Power. Also confirmed to be Steel/Fairy.
MegaAbsol gets the ability Magic Bounce.
MegaMewtwo and MegaAmpharos has not been translated yet. We also got three new Pokemon, including Gogoat pre-evolution, a new Rabbit Pokemon, and a new Electric/Fairy Pokemon. You can see the current leak here.