Denyce is the first mission related Survivor you come across in Dead Rising 2: Off the Record
She will be in the Scoop "Roy's Mart". Simply head to Roy's Mart located in the Royal Flush Plaza near the Slot Ranch Casino entrance. Inside you will have to kill a handful of looters. Once you've talked to her, she will join you.
So basically, in order to have Denyce attack and damage this psycho, you have to drag Denyce all the way through the story without her dying.The EASY way:
If you don't mind asking someone for help (like myself), you can ask someone who has a save created right before the military arrives and join their game, spend 5 minutes and get Alpha & Omega AND Purewal Memorial Cup knocked out easy peasy.
Makes playing the campaign a lot more fun when you can KILL Denyce off the bat if you choose! OTHERWISEThe HARD way:
Drag Denyce through the entire story up until the military arrives (countdown timer tells you when). You have to complete all STORY CASES without failing, and then have her live through it all. Any time you head to the safehouse for missions / scoops you will have to leave Denyce behind otherwise she will be rescued. The best solution for this is to hide her in the maintenance room next to the safehouse. Any time you are in the safehouse or any area not the same as Denyce, she will slowly bleed health (even if you lock her in a room).
One very important
note is CASE 6-1 - The Getaway - You will want to leave Denyce somewhere in Royal Flush Plaza (such as maintenance room) before heading to the Fortune Plaza Hotel to do this mission. This is because upon completion of the mission, you will spawn back into the Safehouse. If you have taken Denyce with you to the mission, she will spawn there to and be rescued, thus voiding your achievement.
Sometimes it can be a pain to get Denyce to physically attack SGT Boykin. Just be sure to save before the battle and also getting knocked down by SGT Boykin seems to help.