Later on that day, the sun was starting to set and Cartman was hiding in the bushes, waiting for Butters to leave his house.
"I swear to god man, I can't wait to see the look on their faces when I send them those pictures." Cartman silently said to himself.
After waiting an hour, Cartman saw Butters, who was wearing a grey sweat shirt and sweat pants with sneakers. He was looking at the sky and saw that the sun was almost down and so he took of to his right. Checking to make sure that Butters wouldn't see him, he quickly sneaked over to the front door and turned the knob. Luckily, to his surprise the door opened and Cartman made his way upstairs. Strangely, he felt very anxious, as if Butters was following him, keeping his mind on the mission, Cartman pushed forward. He checked every room to see which one was Butters and when he went into Butters Parent's room, he noticed that no one was in there.
"Ok... there is something wrong here, wouldn't his parents be here?" Cartman thought to himself.
After closing the door, he finally made it to Butters room, after searching around the room, he finally found what he was looking for, Butters Diary.
"Yes! Now I just need to go to the parts that I need and take pictures of them and send them to Kahl and Stan." Cartman quietly said to himself.
Cartman read through the diary, he started to go back through a whole bunch of memories, from the time he was the robot AWESOM-O to where he locked Butters in a shelter so he could go with others to Casa Bonita.
"Man those were some fun times." Cartman thought to himself.
After getting to the most recently written pages, he was horrified at what he was reading, each sentence he had read was worse than the last.
"Holy shit! This is what I was looking for! I fucking knew it!" Cartman quietly said.
Soon, he started to take pictures of the pages that had the details he was looking for and sent them all to Kyle and Stan. After he was done, he closed the book. Looking at the back of the diary he noticed something that said: For addresses, go to this page.
After going to the page with the addresses, a certain name next to an address caught his eye.
"Danielle? that's the girl that Butters has the hots for, I think Stan and Kyle will need this as well." Cartman quietly said.
Then just as Cartman got done taking a picture and sending it to Kyle and Stan, he got up but when he tried to open the window to make a quick escape, he wasn't able to open it.
"Are you fucking kidding me!" Cartman angrily said.
"Yeah, I know I jammed it." Someone said.
Cartman turned around and saw that it was Butters who was behind him.
"Oh h-hey butters how is your evening?" Cartman asked, trying to be friendly.
"What the fuck are you doing in my house?" Butters asked.
Butters then looked at what Cartman was holding in his hand. Realzing that he had been caught, he tried to hide it behind his back.
"Butters, Butters please, I'm sorry... I'm sorry for all the shit I did to you all these years." Cartman pleaded in a scared tone.
Butters started to get angry, knowing full well that Cartman was saying that because he was scared.
"You are such a lying piece of shit, you are only saying that because now you see me as a threat, and you know what I am and what I've done... For as long as I've known you, you have done nothing but treat me like shit, everyone except recently has treated me like shit... the only person that has ever shown me decency since he has known me was Kenny." Butters ranted.
"Butters... Butters, c-calm down, Look I know you had killed all those people, but I swear, if you let me go, I-I will keep this a secret." Cartman said, trying to plead with Butters.
"Calm down?! How can I calm down! I have always been the dogged nice guy... the guy who always went last... I TRIED TO BE A NICE GUY... I TRIED TO PLAY THE RULES! I have always been the victim, and now I've snapped." Butters continued to rant.
Butters then struck Cartman in the head with the bat he held in his hand, causing Cartman to fall to the ground, disoriented. the blow from the bat caused Cartman's hat to fly off and cause a part of his head to bust open.
"And just for the record, my parents are in a very deep sleep." Butters said with an evil smirk.
Dropping the baseball bat, Butters then started to transform, Cartman could only stay down and look on in horror as Butters started to transform into a werewolf. This time though, the transformation happened a lot faster and smoother, as if Butters was slowly starting to accept his curse. Once the transformation was finished, the werewolf started to maul Cartman to death, Cartman's blood curdling screams could be heard from outside.
Meanwhile, at Kyle's house, Stan, Kyle, and Kenny were all hanging out and talking with each other. When Kyle received texts from Cartman with accompanying pictures. They started to read through the parts of the diary that Cartman had sent him. They were all shocked to find out that Butters was indeed a werewolf and he was the one that had murdered the people.
"Oh my fucking god dude." Stan said in disbelief.
"No fucking way." Kyle also said in disbelief.
Due to how shocked he was, Kenny didn't have any thing to say. After taking a few minutes to take in all the information that had recieved.
"What are we gonna do now? Butters was one of my best friends, but... I just can't believe that he was the werewolf" Kenny asked.
Stan then saw that he had another text, looking at it, he saw that it was Danielle's adress. Stan then showed Kyle and Kenny.
"Wait, Danielle? That was Butters girlfriend, we need to let her know these sudden course of events." Kenny suggested
"As much as I don't want to, I would be for the best." Stan said.
"Wait a minute, what about the police? Can't they do something about it?" Kyle asked
Kenny then looked over to Kyle.
"Kyle, I don't think they would believe us." Kenny rebutted.
The very next day, Stan, Kenny, and Kyle had went back and forth between telling the police or going to Danielle's. After school, they decided on going to Danielle's and they all went down to Danielle's house. Since Kenny was Butters best friend, he was the one who knocked on the door. The door opened, revealing it to be Danielle.
"Oh hello, what are you three doing here?" Danielle asked.
"Hey Danielle, It seems that we have some unforturnate news." Kenny said.
Thinking about it, she let them all in. Kenny showed Danielle all the things that they had recieved from Cartman. After reading all the information, Danielle couldn't believe it, she started to break down.
"No! It can't be, he can't be... one of them, that... that explains why he was acting the way he was." Danielle barely could say, crying.
Kenny comforted Danielle, knowing full well that they were having the exact same feelings she was having. Danielle then looked at them all, she knew full and well what they had to do.
"No... no no no, there has to be another way... There has to be!" Danielle said, pleading with them.
"I'm afraid that there is no other way... Danielle." Stan barely could say.
Danielle started to cry some more as she knew that at this point, Butters had been far too gone to save.
"So, if we are going to kill Butters, how do we even kill him? Aren't werewolves unkillable without silver?" Stan asked.
"We don't even know if the werewolf we are gonna face even has an aversion to silver... Maybe we could try wolvesbayne?" Kenny suggested.
"Why not both? We could try the silver bullet method first and if that doesnt work we can cover a stick with wolvesbayne and stick it through his heart." Kyle said to them.
After planning out their course of actions, they went to get the things ready. Luckily enough Stan's mother, Sharon had a revolver and a silver bullet that came in a set. Kenny and Kyle looked around their neighbourhood for wolvesbayne, they were able to find a few herbs, which they took to a restroom, grinded the plants and mixed them with water, then they dipped the sharpened wooden spear stick and dipped it in the wolvesbayne water mixture.