Wait for them to attack first to flash them, or flash it with your dark light, it will lift up the shield for a while and hit it with flash, weak flash also can.

Anyway this is the best game of 2013 for me, finish it couple of weeks ago and nice ending story, you get to save someone at the end after the final boss, and for me, the boss on the C level are the toughest boss in the game, i mean the fight on the way to reach that boss.

Sneakers are my favorite ghost, totally annoying. hahaha.

Eerie Staircase IS annoying, well took me quite some times to climb the stairs, but manage to find out how to climb it properly, but one mistake at the end makes you are down back to the bottom!!! hahaha.