If rocket man is in his secret pit that had an elevator or electronically controlled doors, will it still work having been underground?
For the EMP to pass through dirt and rock it must have frequencies that are at least 30 kilohertz. I am sure that can be done. Dogs would be able to hear it. If the Pig has bats in his cave, they will be sure to hear it with their ultrasonic capabilities of 100 kilohertz.