The Colossal titan is colossal , we haven ' t seen another Colossal in action , so therefore we don ' t know what there abilities are , all we know is with that amount of mass , they be steaming , and can exhaust most of their energy at will the bomb that went off , but the thing about that is more steam exhausted , the less time Colossal types have to stay in that form , could be a reason why the whole Titans in the wall is a one trick pony , they wouldn ' t be able to pull off much , only walk and destroy with their bodies . Also at this very moment , with no Coordinate in the hands of the royal blood , having the sun recharge the colossal titan that was uncovered a bit , can set him off , but they wouldn ' t destroy everyone because the power of the coordinate is not in the right hands atm .