Gardevoir was holding a Gardevoirite that she somehow got, being in the coastal area of Kalos. "So this is my Mega Evolution stone?" she thought. "I wonder how it-"
Suddenly a bright flash of light occurred, causing Gardevoir to shine brightly, the Gardevoirite turning her into Mega Gardevoir.
"Goodness! My dress! It's huge!" Mega Gardevoir exclaimed, seeing that her dress really was bigger. "And it's even poofier too!" she pointed out. "I wonder if this is going to affect my gas troubles..."
As if she couldn't be more right, Mega Gardevoir unintentionally farted as loud as possible, the grass and trees behind her literally being blown to fits by the Mega force of her gas, which of course was powered up as a result of the Mega Evolution Stone.
"Oh sweet Arceus! My farts are going to destroy the entire Kalos region plus the fabric of time and space if I keep that up in this form!" Mega Gardevoir thought as she took the Gardevoirite and dropped it, transforming back to her normal self, looking back to see that her Mega gas caused the entire forest and the once green grass to wilt in an instant, the land being completely destroyed as a result.
"Maybe I should save this Mega Evolution thing to use only as a last resort..." she thought, a couple of silent but deadlies hissing from her butt.