BouldBox 2.0 came with ability to make ghost jump anyone know what it is about. i found interesting gameplay of unity iso game called boxy jump and there is box like a shadow or ghost follow the colored box see the video.
Ghost jump allows your character to be visible on screen during a jump, but the collision shape dissapears. This way your character is silently invincible during jump. The reason this is important is isometric games where collision shapes can be tricky. I'm sure others will figure out other uses as well