Beating Poison Jam At Underground Sewage Facility:

When you get to the part in the Tokyo Underground Sewage Facility where you have to tag Poison Jam( Tagger's Tag), look in the places where the blue mist come out. Two of them will be there, and the last will be in the next room after that, this room however does not shoot blue mist. Don't worry about time limits, once they get there, only on rare occasions will they even try to go back up, and even if they do, they come back in a few minutes. Another good thing to do is to get up right behind them and spray, and when they turn, turn with them. Just keep on their tales until their damage meter is full and they stop, hold their hands utheir not going to bother you.