After living the best lifetime Toothless could ever ask for in the Barbaric Archipelago, he returns to Alagaësia with his new Rider to prevent a war that could divide the races forever. He is at first afraid to seek help from other Riders, but that delay cost him all the people who again learned to fear the Night Fury. (Spoilers - post canon) Enjoy!

This not AT ALL the kind of crossover you think it's gonna be. To be brief, I'm taking magic, dragons, and some other slight elements from the inheritance and putting it into the world of HTTYD without changing the HTTYD world at all. BUT the story is set in the timeframe of the Roman-Persian wars and has a big impact on the story itself.

When Gem goes missing, Cade and Jacob go out to the HTTYD movieverse to find her, and see why she's vanished. When Hiccup and Toothless realise that the two dragons are more than meets the eye, the four of them scour the Barbaric Archipelago for their lost friend. And how does Drago Bludfist fit into this? [Side-story to Trial by Lightning, the first book of the Riftiverse]

Join Hiccup/Haldor and Eragon as they travel the world of Alagaësia to put an end to the tyranny of the evil King Galbatorix. Hiccup/Haldor is the son of Horst the blacksmith. No other HTTYD characters except Toothless and maybe Heather. Rated T for now. might change later. HaldorxHeather. ToothlessxOC/Heather's dragon

Two dragon riders of different worlds and cultures converge. (Written before the Race to the Edge release.)

(AU). Hiccup was lost. Everything he had know was gone because of one man. Drago Bludvist. "He is coming again for you and only I can stop him." I crashed and met a stranger who was a dragon master like me. I trained him and he, in turn trained me. I am stronger and I will destroy him once and for all. "He has come, he will not stop, and you need me if you are to get her back."

An ancient power long buried, a mark they've never seen, an enemy like they've never faced before. Six friends and their dragon companions embark on a journey that will change their lives forever.

He was outcast by his village for his weakness. So he grew stronger. He has tamed great beasts and done many great feats. He crashed after being attacked by a man with a metal arm. He is Hiccup, The Dragon Lord and he has come to protect Alagaesia from the monsters that have hunted him. He will not stop and he will not give in. Beware he is coming. Beware he is here.

What if Hiccup and Toothless did leave Berk, during the 'Lightning Strikes' episode? Where would they have gone? Who would they have met? - Read, and find out. {I don't own either of these series, or any of the characters in this story.}

its a mix between dragon riders and Erogon i'm sorry if i miss spelled words i'm new to this so its about these five kids who interact with dragons in a world were no one knew existed. and a war is about to happen.

Hiccup finds a long lost dragon egg(from the inheritance cycle) and it hatches for him. The dragon is bonded with him and Toothless. Now that the red dragon has grown up the village wants to kill her and they run away. Ending up in Alagaesia.

What if Toothless and Hiccup were brothers? what if hiccup was a night fury? Night fury are the most special dragon because they can turn into humans. but most of the time they stay dragon. What will happen to a small family of night furys when they meet two dragon riders. Parings will be Eragon/Arya Hiccup/Astrid Toothless/occ

A strange man and dragon wash up on the shores of Berk. People slowly start to turn against Hiccup, and loose faith in the dragons they have housed for the past 5 years, and a plot of destruction is being whispered along the winds...

On patrol Hiccup and the others encounter a large blood red dragon. They go and investigate and to their surprise they learn that this dragon belongs to a man, a fellow dragon rider.

Inheritance Cycle & How to Train Your Dragon Crossover. Who is the mysterious Yandi? Who will be changed into something else? And what did Galbatorix bring to Alagaësia before he was killed? S/T H/OC

Hiccup Horrendous Haddock The 3rd, son of the chief, and dragon tamer. All of Berk has gotten into a troublesome situation so Hiccup and his Night Fury, Toothless must find an unknown help to save Berk from distaster from an invading tribe.