Platform Partner

How do I make it so that on a platform game, there is an NPC that follows you around, then on a certain key pressed he stops following you?

This gets a little complicated if its a platform game..

Does the NPC have all the same properties as you? Like same gravity, mass, jump strength?

Is there moving platforms in your game?

Yes, and Yes, but I can fix the moving platforms thing so he wont fall.

What about..

If arrow key is pressed, wait 1 second, then simulate the control for the following platform character? :)

Thanks! It worked!