This story is a sequel to Multiverse Hearts Volume 1: The Princess and The Frog World

A while after helping the two frogs be human again, they head back to Ponyville to relax. The CMC showed up and asked what happened during their adventure. But everyone, including Fluttershy, but Raptor, Inferno Spike were curious about one question about the two drakes and the unicorn colt that can turn into one; what would it feel like to be a dragon? As if answering their question, a portal appears. So they went into the vortex with the CMC, which didn't seem to have a window to the past this time. When they entered the new world, everyone saw themselves transformed into dragons, except Raptor and Spike, who were already fire-breathing lizards. Then they meet Hiccup, the only son of a Viking Chief, Stoick the Vast, and Toothless, a Night Fury who seems to have lost one of his tail fins, disabling him from flying. Humans and dragons, both unknown to either species, when they be able to trust each other, and coexist in peace and harmony? Find out on Multiverse Hearts, How To Train Your Dragon.
Disclaimer: I don't own MLP: FIM, Dreamworks, Nintendo, or Blazblue. I was only inspired by them to make stories.

Characters:
Chameleo: A heroic Inteleon, a master of the Fox style and Chameleon style of Kung Fu, a jonin shinobi from the Pokemon Village hidden in the mist, right next to Viper’s home, the Valley of Peace, half of the reincarnation of the Element of Magic of the Elements of Harmony of his team, and a member of one of the hidden water village’s teams lead by Clawgashi, a Crawdaunt jonin
Viper: A snake who is a master of the Viper style of Kung Fu, a close friend of Chameleo, and the other half of the reincarnation of the Element of Magic of the Elements of Harmony of Chameleo’s team
Crane: A Crane, Master of the Crane style of Kung Fu, and Chameleo's Partner
Raptor: A Blue Garchomp that can turn black, Chameleo’s younger brother, spent most of his life living in another world, ⅓ of the reincarnation of the Element of Loyalty of the Elements of Harmony of Chameleo’s team, and half of the reincarnation of the Element of Loyalty of the Elements of Harmony of Twilight’s team
Soulfire Nanaya: A Blue Lucario that can turn red, Chameleo and Raptor’s younger brother, martial artist, spent most of his life living in another world, and ⅓ of the reincarnation of the Element of Loyalty of the Elements of Harmony of Chameleo’s team
Morrigan: A navy-blue Rito that can turn her feathers from navy-blue to black, the Champion of the Rito, a master of the bow and kunai knives, descendant of a great Rito champion known as Revali, having inherited Revali’s Gale, a special ability that creates an updraft, being an expert flyer, user of the Medoh Bow, a weapon that summons the Divine Beast Vah Medoh, and the reincarnation of the Element of Honesty of the Elements of Harmony of Chameleo’s team
Datozo: A red Goron, master of clubs and greatswords, Champion of the Gorons, descendant of a tough and strong goron champion known as Daruk, wielder of the Rudania greatsword, a weapon that can used as a club and a sword, and summons the Divine Beast Vah Rudania, and reincarnation of the Element of Laughter of the Elements of Harmony of Chameleo’s team
Bladefin: A red Zora that can turn his scales from red to purple, the Champion of the Zora, a master of the duel-wielding spears and swords, a great healer, descendant of a great Zora champion known as Mipha, having inherited Mipha’s Grace, a special ability that heals others no matter how bad the wound, a close childhood friend of Morrigan, user of the Ruta Spear, a dual-wielded weapon that can be used as a single and two weapons, and summons the Divine Beast Vah Ruta, and the reincarnation of the Element of Generosity of the Elements of Harmony of Chameleo’s team
Vaida: A Gerudo warrior, who wears yellow armor and a attire, chieftess of Gerudo Town, Champion of the Gerudo, master of the Scimitar and Shield, descendant of a powerful gerudo champion known as Urbosa, having inherited Urbosa’s Fury, a magical power that commands the lightning storms themselves at the snap of a finger, user of the Naboris Scimitar and Shield, a weapon and shield that together summons the Divine Beast, and reincarnation of the Element of Kindest of the Elements of Harmony of Chameleo’s team
Sonic the Hedgehog: A blue heroic hedgehog who is the fastest thing alive, and leader of Team Sonic, and the last ⅓ of the reincarnation of the Element of Loyalty of the Elements of Harmony of Chameleo’s team
Tails: A yellow two-tailed fox who can fly, best friend of Sonic, and member/engineer of Team Sonic
Knuckles: A red strong echidna, guardian of the Master Emerald, member of Team Sonic, and rival of Sonic
Twilight Sparkle: A alicorn who is Princess Celestia’s student and Equestria’s newest princess, leader of the Mane 6 and reincarnation of the Element of Magic of her world
Spike: A dragon who is Twilight’s foster baby brother, and personal assistant
Rainbow Dash: A blue rainbow-colored-maned pegasus who is the foster twin sister of Raptor, and reincarnation of the Element of Loyalty of Twilight’s world
Scootaloo: A pegasus filly who is a member of the CMCs and Rainbow Dash's little sister-figure
Inferno: A unicorn colt who can turn into a dragon, a member of the CMCs, Raptor's little brother-figure, close friend and brother of Scootaloo, who has a secret in his magic and scales that nopony knows, not even him.
Pinkie Pie: A energetic and joyful earth pony who is a super-duper party planner of Ponyville, and reincarnation of the Element of Laughter of Twilight’s world
Rarity: A fashionista unicorn who is fantastic at making and sewing dresses and costumes, and reincarnation of the Element of Generosity of Twilight’s world
Sweetie Belle: A unicorn filly who is Rarity's little sister, and member of the CMCs
Water Wing: A pegasus colt who is a member of the CMCs, close friend and brother of Sweetie Belle and has a secret in his necklace that nopony or himself knows about.
Applejack: A strong and truthful earth pony who is a member of the Apple family at Sweet Apple Acres, and reincarnation of the Element of Honesty of Twilight’s world
Apple Bloom: A earth pony filly who is Applejack's younger sister and member of the CMCs
Apple Wasp: A earth pony colt who is Apple Bloom's brother as well as a close friend, and has a secret that no one, not even he knows
Fluttershy: A timid and caring pegasus who lives in her cottage with her animal friends, and is the reincarnation of the Element of Kindness of Twilight’s world
Makoto Nanaya: A Squirrel Beastkin, Soulfire’s twin foster-sister from another world, and martial artist

Guest Characters:
Hiccup Horrendous Haddock III: The only son of Stoick, and the first person to ever train a dragon in his world.
Toothless: A Night Fury dragon who has a substitute tail fin to help him fly and Hiccup's friend who helped the young viking gain his purpose.
Astrid Hofferson: A brave viking who fights with her axe and Hiccup's love interest.
Stormfly: A Deadly Nadder dragon who's rider is Astrid
Stoick the Vast: Chief of the Vikings of Berk and Hiccup's father
Snotlout Jorgenson: A cocky and smug viking who is a hero in his own mind
Hookfang: A Monsterous Nightmare dragon who's rider is Snotlout
Fishlegs Ingerman: A studious and nerdy viking who is always eager to learn new things
Meatlug: A Gronckle dragon who's rider is Fishlegs
Ruffnut and Tuffnut Thorston: A duo of constantly bickering, yet inseperable viking siblings who are fraternal twins
Barf and Belch: A Hideous Zippleback dragon who's riders are Ruffnut and Tuffnut
Gobber the Belch: A talented viking blacksmith who is a close friend and advisor of Stoick the Vast