Magnus Crome is a man of admirable repute among the survivors of the Ten Minute War. He's the only one with a still-functioning Jaeger III suit, and thus is the target of much envy and greed.

He fights to protect the weak when they cannot help themselves, always vanishing before he can be thanked. He is a mystery, and he likes to keep it that way. All of this experience will come in handy, fortunately, when an anomaly that is still the topic of debate among many ponies occurs and he is taken from his own world and placed within another.

He is received with mixed results at the other end.

Kind of a more serious, less random and less comedic version of "The Monster In The Closet."
I really should update that story . . . .