Model X CAN hit Serpent phase 2.2
...I just wouldn't recommend trying it lol
I had to use codes to make Serpent use nothing but the meteor attack and also give myself infinite health and I could only land it one out of every few dozen tries. I included one failed attempt in this clip just to show how precise it actually is. I'm sure a pattern and timing can be better worked out for it but I suspect it would still take some hardcore dedication and execution to pull it off in a real playthrough