Mr. Nitrogen (Sequel to Leonardo the Nightwatcher)

Mr. Nitrogen vs. Shredder

Mr. Nitrogen, The Turtles, and April soon found where Fluttershy was. She was in a laboratory, tied up to the ceiling, a large cauldron of acid down below her. Shredder watched this on a ledge. "You won't get away with this!" Fluttershy said angrily, glaring at him. Shredder laughed and said, "My dear child, by the time I do, you will have died in that acid." Fluttershy looked down in fright. Mr. Nitrogen then barged in. Up above, April and the Turtles were sneaking inside the vent. "Shredder!" yelled Mr. Nitrogen. "Garrett!" Fluttershy cried in relief. "Mr. Nitrogen... I see you've defeated my cronies," observed Shredder. Mr. Nitrogen smirked, leaning on the cauldron casually. "I had help," he replied, "now let Fluttershy go, and this won't have to get ugly."

"If you insist," replied Shredder as he raised his claws. "No, don't!!!" screamed a terrified Fluttershy. "Guess this is one-sided," said Mr. Nitrogen, "how about you come down here and fight me yourself." Shredder leaped down from the ledge, landing on the floor. "Superhero landing? Really?" joked Mr. Nitrogen. "Joke all you want," said Shredder, "but by the time I'm finished with you, you will regret your request to fight me, boy." Mr. Nitrogen raised his hands in defense and said, "Hey, let's make this a fair fight. If you don't use those blades, I won't use my freezing powers, and we can make this a weapon free, combative fight where the best man wins. Sound fair?"  Shredder nodded and said, "You possess a fair code of honor. I respect that. So be it." Shredder removed the blades on his armor, then his sharp helmet, revealing his burnt face. Mr. Nitrogen then turned back into his human form. "May the best man win," said Garrett. The two foes proceeded to fight with their fists. April and the Turtles then got out of the vent, and saw the tied up Fluttershy up above the acid. "I don't like the look of that," said Mikey as he gulped in fear. "Any suggestions?" asked Donnie. April looked at the acid and said, "Guys, I think Garrett froze the acid." They nodded, and Leo threw his sword at the rope holding Fluttershy. The rope broke, and Fluttershy fell down, screaming, thinking she was going to be dipped into the acid! Then she landed on the block of ice that replaced the acid.

"What?!?!?!" Shredder said, hearing the noise. Mr. Nitrogen then kicked him back, saying, "Alright guys, just like we practiced, now!" Leo jumped down and slashed Shredder in the back with his swords. Mikey came down and said, "Comin' through bro!" He then whacked Shredder with his nun-chucks. "My turn!" said Raph as he threw his sais at Shredder's shoulders. Donnie then whacked Shredder with his bo staff. April used her telepathy to lift Shredder up in the air, and the Turtles jumped up, butting their shells on Shredder, saying in unison, "Shell Shock!" Shredder then fell down, defeated. Leo put his sword near Shredder's neck and said, "You've lost, Shredder. Surrender now. Unless you like getting your ass kicked." Shredder looked down in defeat. Garrett then turned into his gaseous form, went up to the cauldron. He went back into his solid form, and went to Fluttershy. "Going up?" he joked. Fluttershy ran to Garrett and hugged him tightly. "I knew you'd come!" she said as she kissed his face constantly. Garrett smiled and said, "What can I say? You're my girl. Let's go home."