Stuck in 6th challenge room

Answer from: goodguy13242435
Ok here it is:1-15 kill your enemies by instant kill. 16-29 first kill the soldiers with the guns , then the ninjas. 30-50 grab the soldiers and throw them to each other. Then , if you have Rage use it and don't think to fill the bar , just use it . The robots are not that much easy but you can beat them. Here is how: Get away from them and when the O button appears over their head press it. (I know it is a little shot but this is how I beat the diamond bruiser in Challenge 4)and then, when he is in really low health go from the behind and press the Λ button. When you do that you will have a great reward: The blue Wolverine costume . Hope I helped you. :)