I think windmill star will faster in 3rd boss since you use start dealing damage to him by using it at the end of level in 3-2 (xipo's idea)

I should not have dismissed this thought so quickly! Improved on the 39119 WIP by five frames (13 frames faster than published run). No time is lost throwing the star at the end of 3-2 since landing on certain tiles stops Ryu for a frame, which is a perfect time to use a special attack. Yay.

What about using firewheel

Of course it will cost 3 frames but it will hit him 4 stake of his health

Well, here's a rundown of the fastest strategies I've come up with for each different weapon: windmill star: 89 frames small star: 92* sword only: 93 fire wheel: 96** spin-slash: 55*** *89 frame boss fight, plus 1 frame to turn around and 2 frames to throw stars before leaving 3-2. **89 frame boss fight, plus 5 frames to knock down the power-up and expend the extra ninpo before picking up the firewheel so it doesn't waste 6 frames tallying into the score, then 1 frame to turn around and 1 frame to throw a fire wheel before leaving 3-2. ***just some fun with the hex-editor. :p And this is also ignoring any manipulation necessary to get the knife-boost in 3-2, and getting the firewheel totally screws that up. EDIT: The quickest firewheel strategy also necessitates taking a hit on the same frame the boss dies (also the case with sword-only), which glitches out the music and the boss's dying/exploding animations — both of which would be mildly neat to include in a TAS, but don't appear to influence anything on their own — and sets $75 (normally always 00) to 04. This somehow effects a machine-gunner in 4-1A, resulting in the bullet that boosts Ryu to the exit being a couple pixels back and costing one frame. I've experimented a little with this address and have not found any other instance where it can cause a desync by being non-zero. In short, it really needs more in-depth investigation, and possibly debugging expertise that I currently lack.

Thanks for reply. I think i will back to TAS.

om, nom, nom... *burp*!