you will fight him 2 times. but both in the bank and in the warehouse you must dodge his tentecles with the circle button then web them with the triangle button. you must do this in pairs. (circle,triangle,circle,trianngle, and so on)
first time around doc ock can be hard but is actually really easy
you didn't say which battle your on eg bank battle train battle final battle but the same technique is required for all the fights...
First, you have to go to the building if you are in easy mode then the game will be hanged and you cannot play the boss level so take the medium mode and play.
There is a Marvel Ultimate Alliance 2 released September 15, 2009 for the PS2 but no game of Ultimate Spider-man 2 only Ultimate Spider-man ( September 22, 2005) and then Marvel Ultimate Alliance...