There is a bug that occurs in the game that causes the game to crash if you hit bosses before the curtain has fully raised on a boss fight. After discussions this has been allowed as the crash occurs at the end of the level after control is lost by the player, so this is allowed in ILs.
I mean, you can use it in full runs if you want, but considering it saves less than a second on the boss fights it is useful to hit the boss with an egg sooner and you have to reset your console via the plug after, I personally don't recommend it ;)
This is just so people know. I guess when tesing they didn't test spamming the (-) button (which is used to skip cutscenes) as a load screen ends which leads to the cutscene for the boss fight not loading and the boss starting immediately as the curtain is rising, giving a window for this to occur. Why it occurs I don't know.
