How to Train Your Dragon and Gravity Falls
Crossovers
Too Many Worlds by AmethystHope
Not one. Not two. Not even three. There's just too many of them here. Why did this happen? Too much time in the wrong peoples hands. There's dragons. And a half ghost? And a half TROLL? WHAT? ;)
Rated: K+ - English - Adventure/Family - Chapters: 3 - Words: 2,697 - Favs: 1 - Updated: 4/16/2019 - Published: 2/12/2019
Selective Minds by Local-dragon-haunt reviews
(Oneshot!) Before the events of Dipper and Mabel's eventful summer, Ford stumbled across a dimension filled with dragon riding Vikings, and bonded with a boy named Hiccup, who reminded him so much of himself: adventurous, smart, somewhat reclusive... But sometimes, even the strongest minds break...(set after httyd2, based off of a comic I found on Instagram *leshrug*)
Rated: K+ - English - Angst/Hurt/Comfort - Chapters: 1 - Words: 1,910 - Reviews: 5 - Favs: 21 - Follows: 7 - Published: 9/18/2016 - Complete
Have a Happy GMAD Birthday, Phoenix! by PhoenixWarriorFox88 reviews
It's Phoenix's first birthday since joining GMAD and everyone wants to make it special.
Rated: K - English - Friendship - Chapters: 1 - Words: 5,600 - Reviews: 3 - Favs: 3 - Follows: 1 - Published: 1/24/2016 - Complete
Dipper's Guide to Deadly Dragons by Nightstar Phoenix reviews
[post-HTTYD; post-Into The Bunker pre-NWHS] Generations after Hiccup, his dragon secludes himself in the forest near the sleepy town of Gravity Falls. Unfortunately for Toothless, nothing stays hidden long when the Mystery Twins are on the case! [Pairing-Free]
Rated: K+ - English - Humor/Friendship - Chapters: 4 - Words: 7,388 - Reviews: 41 - Favs: 59 - Follows: 60 - Updated: 9/29/2015 - Published: 6/18/2015 - Toothless, Dipper P., Mabel P.
Falling Into Berk by Dragon Faller reviews
After Dipper and Mabel fight over Blenden's time machine, they end up on an viking island called Berk and meet a viking and a dragon duo named Hiccup and Toothless. Will they find a way to get home or will they be stuck in the past forever?
Rated: K+ - English - Family/Adventure - Chapters: 1 - Words: 2,247 - Reviews: 18 - Favs: 33 - Follows: 39 - Published: 7/8/2014 - Hiccup, Toothless, Dipper P., Mabel P.