The first appearance of Mystery criminal

It has been 3 months since James has started his work and tonight he was going out again for vigilante time. He put on his vigilante suit and left. He landed on top of one of the buildings and then he started looking around until he recieved a message in his device, it said that in a building which door was automatic, the door become closed and electrified. He roded on the dark wing and went there, when he reached there he jumped from dark wing and landed infront of building. He had to shut the power to be able to open the door with force or he will be electrified, there was a window higher than door which led to electricity room, he grapple to it and entered. The door was locked and there was a locking system beside it, he could hack it and enter, he took out his device to do it, when he got connected to system, a man which was dark with blue on scene has appeared on screen, he said: (Welcome, Dark nightmare, I was expecting you.) James-san asked: Omae (Who are you?) He answered: Boku (I am one of the most intelligent man from here, Mystery man.) James recognized him, and said: Ore Omae (I know you, You are one the most intelligent criminals from the NYC and have done lots of crimes and usually you use your mind to create mysteries, what do you want?) Mystery man answered: Boku Kimi (I wanted to challenge you and see how smart you are, first you need to hack this door's security system and after that you will see other challenge's behind this door.) Then he disappeared and James started hacking, he was successful and he gain access to door. James entered the room, inside the room was a TV, Mystery man appeared on it and said: (Welcome, you passed the first test, this lever can turn off the power, so the door can open, But as you can see it is electrified, now you should answer some questions, which are simple and if you can do all of them, I will cut the electricity and you can save them, Are you ready?) James accepted it. Mystery man said: (Here is the first riddle: How can someone create an electro magnet?) James answered: (If you wind a coil around a core of iron and run electricity throught it, It will become an electro magnet.) Mystery man said: (Correct, now second one: I'm tall when I'm young and I'm short when I'm old. What am I?) James said: (The answer is a candle.) Mystery man said: (Correct again, Now the last riddle that decides everything: What can't talk but will reply when spoken to?) James said: (The answer is an echo.) Mystery man said: (Correct, congratulation, you answered all questions correctly, now as I promised I will cut the electricity.) Then he cut the electricity and then he said: (Until we meet again, Dark nightmare.) Then he left. James pulled the lever down and everything shut downed, then went toward the door and opened it with force, after entering he said to everyone to calm themself, then he opened up of the door which was used to open the automatic door and found what was used to create this, he take it out and said to everyone: It's over, you can leave now. Then everyone left and James got on his dark wing and get back home.