If you asked anyone, they'd tell you Kakashi was a pretty strange, but all together great shinobi. His fascination with the porn novels Icha-Icha was somewhat obscene, but it was no worse than most jounin odd behavior. If you pressed to ask what they thought about his students they'd tell you that he would be the only one to understand them, especially the demon brat; just before they'd get hauled away by the ANBU for some 'gentle questioning'. This would lead you to believe that he had managed to do the impossible and figure out the mental processes of one Naruto Uzumaki.
As such, it would come as no surprise when you would find Kakashi sitting in a tree reading his favorite novel, while his students sparred below. When his students fall quiet for a few minutes he'd look down and check on them casually. Sasuke would be studying a new katon jutsu, striving for the much sought after power to kill his older brother Itachi. Sakura would be daydreaming about things that could fill the entire Icha-Icha series about said avenger. And finally, Naruto would be... missing?
Lowering his book he looked around for the missing blonde more carefully. He knew deep in his elusive and often confusing mind, that not keeping an eye on Naruto would mean no ends of trouble. And that's when the rumbling started. Turning towards the source of the rumbling, Kakashi found his book tumbling from his now numb fingers. He didn't want to know, but knew he had to find out where Naruto had found that... whatever the hell it is. While his other two cute little pupils ran with twin trails of urine marking their path, Kakashi sighed and teleported onto the top of... that thing, next to the Jinchuuriki that was cuddling it and cooing like a baby.
"Naruto..." Kakashi started cautiously, while looking down at the thing he was barely standing on. "What the hell is this?"
Looking up with that big foxy grin of his, Naruto seemed like a little kid bringing home a puppy. "This is my new pet Mr. Sumo! Can I keep him?!"
Kakashi thought about the request for all of the five nanoseconds he needed to recover from the insane request his student was posing. "Answer my questions and you might be able to... What is Mr. Sumo? Where did you find him? And what the does he eat?"
"Mr. Sumo is the best, widdle Chakra steel golem ever! Yes he is! OH YES HE IS!" Naruto gushed, hugging his monstrosity like it wasn't a two hundred foot tall middle finger to nature and physics. Then again they were ninjas, and nature and physics seldom played parts in that.
"And he was in a cave over there..." Naruto continued pointing off down the path of destruction that 'Mr. Sumo' had caused. "The best part is he only needs my chakra to charge him! Can I keep him, please? Huh? Can I? Please?"
"Hold on Naruto... how do you know all this?" Kakashi asked, his brain still trying to sift through everything. A second after the question escaped his lips, Naruto held up a paper entitled "Care and Maintenance of Your New Chakra Steel Golem" for Kakashi to look over.
Kakashi looked over the information, and sighed heavily as he considered letting Naruto keep the behemoth. Finally he thought of a loophole that could get him out of this mess. "Go ask the Hokage Naruto..."
Unfortunately, he never considered Naruto would TAKE the humanoid monstrosity with him. After destroying a section of the merchant's district, which Kakashi barely noted had refused to serve Naruto every time he'd come in there, they arrived at the Hokage tower. However, Kakashi's hopes of passing the buck to the Hokage were dashed when he saw the blinds with a giant "Ask Kakashi" painted on them.
Kakashi looked down at Naruto and sighed before nodding his assent, not knowing the sheer amount of doom he was bringing to the village, or the world as a whole.