Is there any way or trick to have appearance chance to our object ? Or is there any way to change action into an enemy ?
Place your object into an Action's default animation... When you open the animation editor there is a list of your objects on to the left, just drag them in...
You can add a Spawn component to that object with a very very slow Spawn Rate, like 999999 so it will only create 1 object in a reasonable play time. Then that object behaves exactly as any normal objects would do.
