i am going back on my post above, there is a 17th colossi
he is up in the garden(on some versions of the game)
on the left hand side of the garden there is a set of steps too high for u to get on, and also near the big hole in the floor, there is a raised area with steps leading up to the wall. he smashes out of there.
he is like number 11 and 14, just much bigger
thank you. that will be all