Castlevania: Aria of Sorrow Boss Rush (No Damage)

Originally I was just going to upload a sub-4 minute Boss Rush (since that's the last time cutoff the game gives you a new reward) but I thought it would be more interesting (and a more stringent test of my understanding of the game) if I went for no-damage instead. Sort of like the HoD boss rush, liberal use of Souls might make some fights unexciting, but hey, if that's the best strategy, I'll use it.
Done on emulator, mGBA.