Hydreigon: Type: Dark/Dragon Ability: Malice (Boosts Speed when hit by a Fighting-type move) HP: 102 ATT: 105 DEF: 100 SPATT: 135 SPDEF: 100 SPD: 108 (BST: 650) New Moves: Dark Wave (Dark-type move, 100 Base Power Special Attack that cancels all stat alterations), Psychic, Thunderbolt, Thunder, Ice Beam, Blizzard, Nasty Plot, Agility, Close Combat
Yeah, I don't think their HP will be changing at all. Nor do I think they'll be able to get different moves. Also, I disagree that Chandelure or Hydreigon need Mega forms. They're fine as is. Especially Chandelure as it just needs Shadow Tag to be released.