When fighting Kraven on the second part, there is an unlimited amount of lizards which enter through the red smoke. Jump there and wait for the lizards to come out. When standing there, Kraven is unable to jump up and cannot harm you. Because you have the Symbiotic Suit, you will have a purple meter which can give you a rage mode. Fill it and trigger the rage mode. You can then jump back down to Kraven and press the RB + Y to jump up and slam down on him. Repeat this until you can begin the button sequence. Note: Kraven might be able to jump on the ledge near the entrance once or twice. If he does, jump down. When he follows, jump back up and continue. Also, if the lizards stop appearing, jump down and kill some of them then go to the red smoke and they will come out again.