Jekyde (Normal) Curious Pokemon Ability: Inner Nature [When this Pokemon's HP becomes less than 50%, it's type changes to Normal/Dark, it's Attack and Special Attack double while it's Defense and Special Defense half]
"A calm and friendly Pokemon most of the time, these creatures exhibit bizarre mood swings that affect their entire physiology, becoming violent, dangerous to themselves and others and much more powerful when provoked."
"The greatest pleasure in life is doing what people say you can't do." ~Walter Bagehot
I personally think this would be interesting to see. I've always liked Jekyll/Hyde themes, and the Hyde form's stat distribution is much better fit for an ability that requires that kind of trigger compared to Darmanitan's Zen Mode.
Though, my one question is what kind of moves could we expect this Fakemon to know?
"This isn't the Ask Auntie Pandora Hour!" ~ Pandora, Kid Icarus: Uprising Official Zorua of the Pokemon X / Y boards.