The Marvel-ous World of Ponies

Mischief grunted as he hit the ground in a vertical landing. Rainbow Dash didn't feel a thing. Within seconds she grabbed her (adoptive) brother by the shoulders and pressed him against the stone wall of the mountain.

"Are you crazy?" She asked him, clearly angry, "What do you think you're doing?"

"You can't make me tell," Mischief teased in a childlike tone, "It does not concern you."

"I can't make ya tell, huh?" She asked, pressing harder, "We'll see."

"As I said," Mischief answered, voice becoming higher-pitched as he was pressed harder and harder into the unforgiving stone, "this does not concern you."

"Of course it does," Rainbow told her brother, "Equestria is under my protection."

"Then why don't you protect this world?" Mischief asked, "It squabbles day by day, never stopping. These ponies slay each-other for power. You aren't doing a very good job."

Rainbow Dash dropped her brother at hearing this and said,"Listen well, brother-" were the last words Rainbow Dash could get out before she was sent flying into the forest.

Mischief grinned and said, "I'm listening."