uhhhhh... Why do you need events for the shadows???
If you go into VX, you can set the passibility of the tiles to an "o" an "x" and a "*" if you hit the orange body above the tilesets (on the right side). If you set the passibility to a "*", it makes the tile appear above the actor.
Because a shadow is semi-transparent in the tilesets, it would make it appear as if the shadow is falling on him. It looks the same as a regular shadow.
If you aren't sure which tiles are the shadows, they are in tileset B, the 9th row and the 1st-3rd columns.