A1: I found a trick that may be useful however, this may take a few attempts mind you. Try sort of like hovering your thumb maybe about an eighth to a fourth of an inch above the center between all four buttons(X, Square, O, Triangle). When the button sequence happens then immediately start tapping the specified button as fast as possible. If you succeed then you will hear a very faint beep from the game, of course when this happens reset your thumb for the next button tapping, and after suceeding at that one, reset and start the process again, etc., etc. Eventually you should suceed at the challange. This trick should help you to speed up critical reaction time.

A2: I was stuck on this bit too but it turned out it was the remote I was using (some cheap ass little one), no matter how fast I pushed the buttons it wouldn't work but as soon as I changed remotes it was much easier. If you have another remote try that.

A3: You have to be really focused and have your thumb ready to press any of the buttons.

A4: Press the start button and go to game and press quit game then press new game repeat this twice and it will work

A5: Theres only a certain number of 'random' sequences they can program write down the sequences then you will know which one is coming before it comes up

A6: You press buttons before you try to fight with him first time take aguess at which button to press and if you are wrong then the button that was right will be the button you need to press the next time.