Reason: Self-modifying. -.- Only used in Chiyuri's EX Attack (the one with the diagonal lasers). Part of P0182, funded by Lmocinemod and [Anonymous].
Oh wow, it's exactly how I always naively imagined collision detection to be implemented in a fixed-resolution 2D bullet hell game with small hitboxes. Part of P0182, funded by Lmocinemod and [Anonymous].