I own nothing all of this is Eric Kripke's...

A Supernatural Fanfic, this will be a long ongoing story, starting from season one and there will be multiple fanfics for every season. I modified some of the episodes to fit the fanfiction. PLEASE REVIEW I NEED IT.

It was extremely quiet as Dean lay there sleeping in his bed. Sam snores softly in the bed next door a few feet away. It was a pleasant morning, one of the few days a hunter could almost get to five hours of sleep. Dean rolled over and sighed peacefully when a loud scratch sounded at the door. Being a light sleeper Dean sprang up first. He held the knife he kept under his pillow and got up from the bed cautiously. "Sammy." He whispered. "Sammy, get up" Dean gave him a little shake in the leg.

Sam grumbled something incoherent, something like,"Don't call me Sammy" then rolled over and immediately went back to sleep. Dean rolled his eyes and slowly approached the door, treading lightly across the carpeted floor. The scratching intensified as he stepped closer, Dean thought he mistakenly heard the sound of a dog growling. He cracked the door open and there stood, no more than three feet tall, was a muscular female rottweiler The dog wagged its tail happily, and bounded in the room with a joyful bark. She was huge, large canines and a practically sparkling coat. The rottweiler immediately jumped on Dean's bed, lay on its back and proceeded to roll around like she was a pig in mud. What the hell? he thought. The dog stopped its rolling and sat up to face Dean, she seemed to smile.

"Sammy, I swear to god, wake up." as if on some unspoken cue the rottweiler barked harshly and growled in Sam's direction and Sam literally jumped out of his skin and off the far side of the bed. He slowly rose up rubbing his lower back sorely.

"Since when do you have your own personal K-9 unit?"

"It just walked in and sat down!" he gestured forcefully at the animal and she panted quietly. He stood and sat next to her on the bed "She just sat down and stared at me." she yawned and lay her head in his lap.

"Did you use silver on it or anything?" Sam said and sauntered over to where the two sat on the bed.

Dean inspected the collar "The collar has a pure silver pendant." He rest a hand on her head lightly "She seems clean." the dog rolled over on her back, showing off her silver dog tag. Dean turned it over in his hand. In plain, almost carved handwritten lettering was the name Diesel. Sam rolled his eyes and walked into the bathroom.

"You better turn that thing in. It's probably someone's around here."

"No address on the tags Sammy." He turned back to the dog, Dean felt a warm pull, as if he were immersed in water, only for a moment he had a strong head ache but afterwards all he could think of was what he had to do for the dog. It was almost intoxicating. "Where are you from huh?" She whined softly sit up again to face him. "We'll to find your home won't we now Diesel?"

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Dean had searched all day, not a single female rottweiler named Diesel missing in the entire state of Colorado. It had been at least a day since they had finished the Windigo case, he had expected at least a day of some relaxation and hustling pool and now he sat alone in the motel room entertaining some animal that had dropped by their room of all places to beg for a snack. "Dean! We gotta get goin if we're gonna find dad!" Sam had been busy packing their car for the road ahead, the past couple of hours. Dean looked down at the sleeping hound, and she met his eyes with a pleading stare. He tried to attempt a threatening scowl, but was melted by the dog's honey colored eyes.

"Fine, gimme a sec."

Sam sat up against the hood of the Impala, checking his phone's clock impatiently. When Dean trotted outside the dog was trailing behind him wagging her tail with everyone of her steps. She stood by Dean patiently, as if waiting for him to issue a military command.

"You're bringing that thing along? Is it even allowed int the car" She stood slowly and growled up at Sam.

"Her name's Diesel, and she's only staying until we can drop her off in any town that wants a reasonably priced guard dog." she yelped happily, relinquishing her defensive stance. He crouched down next to her, staring her right down the nose.

"First rule: No barking in the car, Second Rule: No peeing in the back seat, Third Rule: You're always in the back seat." She sat back down in what seemed to be respect and panted heavily. He stood again and opened the back door of the Impala. Diesel jumped in and spread out her entire body across the seat and looked up at them.

"Next town. She's going to the pound." Sam complained and shook his head and walked to his place at shotgun.

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"She stays." Dean stroked her head as she sat down around his feet. Sam rolled his eyes for at least the hundredth time that day.

"Dean, she helped us with one case, one case. She's not a good luck charm."

"She went out in a spirit infested lake and saved me and a kid from drowning by carrying both me and him out of the water by the strength of her teeth, she's a good dog." She barked happily and beat her tail on the floor.

"She probably has fleas!"Sam complained and the dog looked at him and growled deeply in her throat. "She doesn't even like me!"

"Maybe if you didn't call her a flea ridden furbag..." he mumbled under his breath. Dean turned back to packing his bags as Diesel yawned and tried to fall asleep on the motel floor. Sam rolled his eyes and tended to his own belongings. Someone knocked at the door, and Sam rushed to open it, it was Lucas and his mom,

"Hey," she smiled "Glad we caught you." Lucas smiled and immediately ran into the motel room to the dog. She barked at him and rolled on her side. "You never told me her name." Andrea smiled.

Dean looked over at the dog, no, his dog and beamed. "Diesel, her name is Diesel." Dean spoke from inside the room. He grabbed the duffel bag and walked out the door he whistled and Diesel trotted over, Lucas not trailing very far behind. Sam let them pass as he finally saw a very large plate of sandwiches in Andrea's hands.

"Lucas insisted he made them himself, for your lunch on the road." Diesel playfully chased Lucas around outside and Sam took the sandwiches from Andrea,

"Hey Lucas how about you help me load these in the car?"Sam said and the light haired boy couldn't hear him over Diesel licking his face. Sam walked with Andrea over to the car where Dean was checking the contents of the trunk.

"Where d'you get her?" Lucas said as he walked with Diesel to the trunk, "She's a really good guard dog" Dean took the sandwiches from Sam and set them in the back seat after he had closed the trunk Lucas and Diesel had come to sit near him on the ground in front of the car.

"I don't exactly know, she just kinda...showed up." He subconsciously patted her head and she whined pleasingly as a result. "She's a good dog though, doesn't bark, obeys perfectly, and apparently saves lives." Lucas gave Diesel's belly another rub and she licked his ear.

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Diesel stayed patiently in the back seat as her new owner solved his case with his brother. She did her best to not bark, she did not pee in the seat. She yawned as they arrived at the airport, stretching across her makeshift bed. "Alright, I'm hiding the car and unlocking the door, I'm leaving the door cracked, when I'm back I'll whistle for you." Dean and Sam got out of the car and Diesel could faintly hear Sam say with a laugh. "You treat that dog as if she was our 17 year old sister" she chuckled internally as she heard a smack and Sam groaned quietly in pain. As soon as their footsteps faded out, she shifted into her human form. Diesel sat up and crossed her legs in the seat, she pulled at her caller it was faintly straining on her delicate neck. Her dark hair flowed around her shoulders, and her red eyes sparkled with mischief. Diesel cringed in pain as she felt the wretched demon lord calling for her. She pushed open the door and stepped out in the cool night air. The woods behind the parking lot of the airport were dark and damp, not exactly the safest place for a almost completely naked woman with nothing but a collar on. She sighed and started off slowly, keeping sure not to get dirt somewhere uncomfortable. It's extremely difficult to walk in the woods. Especially without shoes, or anything else really. She walked for what seemed like hours until she came to a completely dead clearing, cracked dry dirt and not a plant in sight. Crowley stood plainly in the woods, checking his watch looking clearly out of place in his crisp Italian designer suit.

"I need you to stop summoning me Crowley, my mother's hatred for you grows every she senses you presence around me." He didn't answer immediately, but stared at her beautiful physique, her mother had really created a work of art when she made her. He grinned wickedly at her as he realized his distraction.

"Sorry love, let me fix that." He snapped his fingers and Diesel was zapped into a little black silk dress with red heels.

"Dressing me like a whore will not get me to obey you, Eve's pact with the devil was fulfilled, my mother will not stand this. And you are not going to control me." Crowley laughed hysterically at her simplicity

"You're here darling, and you're still technically a hell hound. So you have to listen to me, or that death oath you signed with the crossroads demons will completely obliterate you." She darkened her look, she less than fondly remembered her mother sending her off to Hell for a deal with a devil.

"I followed them from Stanford, I glamored Dean into letting me come with him. What else do you fucking want from me?" he completely dodged the question.

"Diesel? Is that what your going by now? What ever happened to Cerberus? or-" she growled. "Don't you speak of my other names, I was created to guard, to protect the souls of the dead, not to become a lap dog for some hunters from Kansas." She said with a huff and turned to leave.

"And that is what you're doing love, you don't need to know why. You are going to protect those boys, if you have to die for them, you will, do you hear understand?" A burning pain shot up her back as she tried to leave the edge of the clearing.

"Y-yes." She cried out as the burning sensation intensified. The crossroads demon smirked in the darkness

"Good dog." Crowley muttered and the burning pain ebbed away.

She smelled Dean's scent faintly in the air, "If we're done here, I'd like to leave."

She shifted back to a dog, the remnants of her outfit falling limply to the dry dirt floor. She ran through the woods as she heard Dean whistle lowly. Diesel reveled in the feeling of the frosty wind beating on her tail. Diesel burst out of the wood and tackled Sam, licking his face. Sam yelped and tried in vain to push her off but the dog was too strong. "Alright Diesel, Okay! Get off!" Dean yelled and whistled for her again. She obeyed and rolled off him to the side. Dean laughed and pulled Sam up. "Back seat Diesel." She obeyed and went through the already opened door and waited patiently for further instruction.

Dean and Sam both got in and Diesel fell asleep to the roar of the Impala's engine.

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She sat and waited in the crummy motel room, the boys had left her here, going off to the bloody eyed man's funeral. Nothing too serious, they had probably gone to the library afterwards. They come back later flustered and a little annoyed, with huge stacks of books . Diesel barks happily and circles around both their feet, barking and making a huge commotion. They get to work on searching through the books, looking for something on a woman named Mary, Diesel caught. It dragged on for a few hours and Sam grew tired, using the dog as a pillow, she tolerated it, god knows he needed some extra sleep. Until his eyelids fluttered and his breathing evened out. After about an hour of Sam sleeping while Dean was researching, the younger Winchester gasped suddenly and sprang up in the bed. Dean looked at him unsurprisingly as he rubbed his face.

"Why'd you let me fall asleep?" Sam pet Diesel's head. "Because I'm an awesome brother, Diesel's really the one you should be asking. So what d'you dream about?"

Sam sighed inwardly "Lollipops and candy canes." Dean nodded his head lightly and gave a sarcastic smile.

"Yeah, sure." She listened to their conversation about mirrors, apparently a giant one fell on a guy name Dave. They seemed unsatisfied with their results. Diesel got off the bed and sat next to Dean's chair. And he pet her head absentmindedly. The phone rang, and the way Sammy's face changed, it sounded like they were going to have leave again.

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They were at the park sitting around this crying girl, letting her heart out about how her friends eyes were scratched out. "I'm insane aren't I?" Diesel whined and lay up against the girl, she rested her head at her feet. "No, you're not insane." Dean retorted. She played with Diesel's ear "That makes me feel so much worse..."

They had to go to Jill's house apparently, she waited in the car patiently. She stuck her head out the window as they returned almost triumphantly. Diesel moved over as Charlie got in the car. "So you guys have a dog that listens to whatever you say huh? Like your own personal K-9 unit?" She scratched behind Diesel's ear. "Uhh... yeah sort of, she's a good dog." she happily barked. "She's sweet, I'll give her that. Where are we going exactly?" Charlie questioned. "The library, to find out who Gary Bryman is."

They sat outside, waiting for Sam to come out. Diesel sits under the bench and beats her tail on the ground. "So, Gary Bryman was an eight-year-old boy, two years ago he was killed in a hit-and-run. The car was described as a black Toyota Camry, but nobody got the plates or saw the driver." Diesel lifted her head, this just got interesting...

Diesel stood careful watch by Charlie, the terrified girl was folded up against herself on Sam's bed, crying to herself. Diesel would circle from the bathroom door to the front, she smelled danger all through the apartment. Feeling her nerves settle she sat at Charlie's feet. "Why did I have to leave him..." Charlie sobbed again. Diesel rolled her eyes internally, human's had such petty emotional distress. She faintly remembers a man who died because of the lost affection of a former lover. Diesel remembered faintly back to her days guarding Tartarus.

Cerberus stood proud, the gates behind her and a line of souls in front. She was twenty feet tall, and each paw four feet wide. The man next in line was thinner, and his eyes were sad and more hollow than most spirits. She spoke deeply "Cause of Death?" the man looked choked, but managed to get out "Overdose on Vicodin" He looked away from the three headed beast in shame. "You're lifted from all earthly attachments, why are you so, distressed my son?" The man looked up. He stared at each of the wolf heads separately, "The one I loved, helped cause my death." The right head spoke "If you truly loved her, she will be united with you in your heaven." His eyes seemed to light up a little. She moved her powerful legs and gave the man access to the dark gates. "I give you entrance to the underworld" said the left head. The man smiled and slowly walked through the gates. She turned her head in tearful shame, because she knew what lies ahead for those who commit suicide.

The boys returned hours later, content and sincerely triumphant. They talked to Charlie as they loaded themselves and Diesel into the car. They were just starting off when Dean interrupted the silence "Now that this is all over, I want you to tell me that secret."She could almost hear Sam's internal groan. "Dean, you're my brother and I'd die for you, but some things I need to keep to myself." Dean took the answer disdainfully and focused on driving.

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What'dya think? It's my first fic so its bound to have some holes and errors. Please review and I promise to be your best friend! (Following is even better)