Hey guys! I'm here with a new story for TMNT! This is my first fanfiction so please be gentle, I am extremely anxious about releasing it T~T! Reviews would be most appreciated! Also, this story will be updated once a week, so expect future chapters! (ugh, in a while this first message will probably seem really cringey looking back XD)

Anyway, enough of my ranting! Enjoy the story! 3

The lair was unusually cold tonight. The whole place stank of pizza and ice cream from a Mikey disaster earlier at dinnertime. He had forgotten to put the top of the blender on while conducting a food experiment with ice cream kitty, causing the concoction to fly everywhere. While the rest of the turtles stayed in the kitchen to clean it up, Donnie swiftly snuck away to work on new batch of retromutagen for Timothy. Hopefully he could finally continue another batch without distraction this time.

The turtles had met timothy after they had taken out the Shellrazor for a test drive. Timothy was "fighting" the purple dragons; however he was only a kid who had dressed up in a costume as the Pulverizer; a "superhero" with no actual fighting skills, who ended up getting brutally beaten up by them. He was inspired to become a hero ever since he had first seen the turtles fighting against the Kraang a few months back. He eventually made it to their lair where Donatello trained him for a bit; only enough so that he wouldn't get creamed in battle like before, but this resulted with the Kraang getting away with the power cell. After this, Timothy joined the foot clan in order to become a better ninja and spy on them for the turtles.

Timothy then volunteered to be experimented on with mutagen so he could take out the shredder on his own. Donatello and the other turtles attempted to rescue him, but in the end, they couldn't save him and he got his wish. He was turned into a gigantic blob. The turtles escaped and Donnie set up a tank so he could stay in the lab; living on fish food. He later mutated again into mutagen man, tracking April after all of Donnie's talk about her. Donnie managed to capture him again with a chemically induced reject batch of retromutagen that froze him.

All these events had occurred about a year ago, and ever since then, Donnie swore to himself he'd make an antidote for him. After all, Master Splinter once said that the Pulverizer was his responsibility. Until then, nothing else mattered… eventually; this had lead to him shutting himself away from everyone and the others to worry about his declining health while he worked. He barely came out of the lab and he scarcely ate or slept. Whenever he did, it was always as minimal as possible. He mostly did either to get them off his back. He focused hard on his work, blocking out everything else, even his own brothers.

He carefully added the next component to the batch. "Easy does it…" The batch exploded everywhere, onto the floor, the ceiling, the table and an unnoticeable speck onto Donnie's beak."Ugh… Not again!" Donnie shouted. He sighed and slammed his angry fists onto the table, grunting, and sending more chemicals soaring everywhere. Great… another mess to pick up… He thought. "I seem to be messing up more than helping lately…" he mumbled to himself. Donnie leaped off of his chair and leaned over to pick up the beaker that had broken onto the chemical inhabited floor. As his hand reached for the glass shard, he felt a sharp pain shoot through his arm.

"OW!" He cried. Donnie retracted his arm to see his palm that was now graced with a throbbing, bleeding cut, exposed to some of the chemicals. "Great…" He mumbled. "Isn't today just my lucky day?" He complained. Donnie picked up the remaining glass cautiously and lifted it slowly into the trash bin to avoid further injuries.

Donatello sadly sighed and made his way over to his medic kit. He carefully spread disinfectant and wrapped his hand with gauze. He looked over at the floor. The assortment of chemicals was painted all across the concrete floor. He wrinkled his nose in disgust. In addition to an array of… Mutagen…

He felt his heart stop, his lip trembling. No… he thought. He took a step back, knees trembling. His rusty red eyes widened and his breathing grew quick and heavy. The room span around him, and he tumbled over into some metal filing cabinets, struggling for balance. No, no, no! He repeated. This can't be happening! Papers flew into the air, and he tripped onto the floor. He caught a brief glance at the glowing, oozing puddle that taunted him. The last thing he remembered was the throbbing pain in his arm…

~Time lapse~

"Dude, are you in there?" Mikey called. The other turtles had noticed that Donnie had skipped on helping them clean up the mess, which had left Raph fuming at Mikey, and caused Leo send out Mikey to find him while he and Raph cleaned up. Something about "Donnie having responsibility" or whatever. Not like Mikey cared anyway. He just really wanted to see Donnie for once. After all, Donnie was almost always in his lab, so he was rarely seen. He shrugged and went to search for his purple banded brother. Mikey was humming and quietly rejoicing as he searched because he got out of some of the cleaning.. Heh... Maybe I can get out of more work by purposely taking a long time… He snickered mentally at the walked up to the lab door and knocked; something he rarely did, but the last time he barged in, Donnie had been in an extremely cranky mood due to loss of sleep and sent Metalhead after him.

"D?" Mikey said. He whimpered and knocked again. The lab was eerily quiet. Usually the bustling noise of Donnie shuffling around the lab, working on a number of various experiments could be heard. But there was no response. Mikey slowly pushed open the door and peeked inside. "Whoa…" A glorious mess was displayed that put the one in the kitchen to shame. The overhead light flickered, and the chemicals on the floor had begun to smell. Mikey carefully looked around, avoiding the substances on the floor. "What the heck happened in here...?"

And then he saw Donnie. Mikey's eyes widened. "DONNIE!" He cried. He looked all over the limp, unconscious body of Hamato Donatello that seemed to be breathing scarcely. Donnie shuddered at Mikey's warm touch, which nearly brought Mikey to tears. Mikey struggled to flip him over onto his shell. "You're gonna be okay D! Just stay with me…" He could feel the tears building up as he gave his older brother a quick pat. Mikey raced into the kitchen. "Guys! Donnie got hurt real bad! There's a huge mess of stuff in the lab and he's barely breathing!" Mikey breathed heavily with tears in his eyes. Leo's facial expression completely changed. He gave the rest of them a look to follow his lead. They nodded and chased after him into the lab.

When they got there, Leo and Raph gawked at the mess. "What the heck was he doin' in here?! Messing around with an atomic bomb?" Raph yelled. Leo looked over Donnie, searching over his wrist for a pulse. "This isn't good…" he said reluctantly. "Raph, can you go get Master Splinter?" Raph smirked. "Sure thing, fearless..." Leo frowned and blushed. "Just do it! And don't call me that, this isn't a laughing matter!" he practically shouted. "Whatever…" Raph mumbled. And so he dashed off to go find Master Splinter.