This story is a crossover between How To Train Your Dragon and the Fallout series, I'm starting with Fallout (The First One), and Toothless is the main character, yay! Start the show because...war, war never changes
Chapter 1 : Vault 13
Toothless felt weird, he was asleep, but yet his body felt...wrong, like something was different...and missing, he opened his eyes and then locked at himself...before freaking out
He was in a human body, a adult human body, he collapses to the floor. He notices that he's in a light gray room, with a bed and dresser, and a sliding door with the engraved numbers reading "13"
"HICCUP! WHAT THE HEL HAPPENED!" Toothless yells and 2 random people in blue suits run into the room
"Hey, what's wrong?" One random man asks and Toothless backs away from them
"You! W...who are you? Where am i?!" Toothless asks franticly and the one random man looks at the other and then faces Toothless
"You must have amnesia, you're in Vault 13, also, my name is Dan" Dan says and Toothless looks even more confused
"V...Vault 13?"
"Yea, you know? A huge underground fallout shelter"
"F...fallout? From what?"
"The nuclear war silly! Now get up! Its time for dinner, do you remember your name?"
"Hel yes! I remember that my name is Toothless, i was born a dragon, i am supposed to always be a dragon, and i don't know why the hel I'm here"
"Damn, his amnesia must be causing him to have a fake personality from one of those old holotape story's about dragons" Dan says and manages to pull Toothless up from the ground, they exit into the huge, underground nuclear bunker
...
"I've learned a lot about the world from before the nuclear war, I've learned about the vaults, America, china, the great war, and other stuff. But i miss Hiccup, Astrid, Fishlegs, Stoick, Snotlout, everyone...maybe they where a dream, but i can still have hope, and I'm still Toothless, even if I'm stuck a damn underground fallout shelter" Toothless writes in his terminal, he stops and lets out a loud sigh before face palming, he starts writing again
"This is my first official terminal log, and yet i still type like a pro, maybe its from the fact Hiccup taught me to write Norse, that I've picked up on English so fast. Man, i miss being a dragon, i miss having wings, i miss having fire, i miss having four legs, i miss having a tail, i miss having my flight, and i miss having Hiccup to accompany me threw the day and night. I cant...i cant keep writing this right now" Toothless finish's writing and sighs before saving and turning his terminal off, he gets up and lays down on his bed
...
Everyone had to draw straws today for no reason and of course, Toothless drew the short straw
"Is this good or..." Toothless asks and Dan turns to him
"That means you need to see the overseer, for something..." Dan says with absolutely no clue about what the overseer wants
...
Toothless walks into the overseers office and the overseer, Jacoren, turns to Toothless and sighs
"Ahh, your here, good. We have a problem" Jacoren says and Toothless gets nervious, is he the problem?
"W-whats the problem?" Toothless says and Jacoren sighs
"We got a problem, a big one, the controller chip for our water purification system has given up the ghost!" Jacoren states and Toothless is somewhat happy that he isn't the problem, but scared for the Vault Dwellers of Vault 13
"Can we fix it?" Toothless asks worried
"No I'm afraid, we cant make a new one, and the process is to complicated for a work around system. Simply put, we're running out of drinking water, no water, no Vault! This is crucial to our survival. And frankly, i think your the only hope we have" Jacoren says
"What can i do" Toothless asks with hope
"You need to find us another controller chip" Jacoren says with a sigh
"How long will i have?" Toothless asks
"We estimate that we have four to five months till the vault runs out of water. We need that chip, we've marked your Pip Boy map with the location of another vault, not a bad place to start i think. Look, just be safe, ok?" Jacoren asks and Toothless nods
"I will" Toothless says before walking over to a bench and picking up a 10MM pistol and some ammo, he picks up a knife, and some other stuff. He goes to the elevator and press's the first floor button, he exits the elevator and steps up to a door with the numbers 13 on it
Suddenly a red light starts flashing and a small alarm sounds as the door slides up, Toothless walks into the airlock and the door shuts behind him. The rooms lights flash on and the computer terminal on the wall starts making a noise while lines of code pass by. Suddenly a alarm sounds and the lights all turn red, the vault door slides outward, where a weird arm device grabs the door and pulls it aside, Toothless eventually steps outside and into the wasteland, or a cave in the wasteland