@Стрелок:
One more thing: Was it ever confirmed that this fruit is actually the mera mera no mi, aside from Doflamingo saying it. He is known as an expert manipulator, so it's possible that it is actually another fruit and he lied. But everyone here accepts this as a fact.
the form of the fruit was kinda like fire. or how flames are drawn.
i would believe he could be lying if he was showing it for the first time to the strawhats. but why would he lie to his card guys?