History Manga / FairyTailHappysHeroicAdventure

* BigBad: [[spoiler:General Star, the ruler of [=ScienCity=], whose lust for power lead him to use Marice's magic to try and conquer the world, which would create the animal world Happy is transported to.]]

* ButNowIMustGo: A ForegoneConclusion , Happy knows once his quest is finished, he'll have to leave his newfound friends to get back to his world. Often times being a little too eager to get back that he has to catch himself and remember that the people of the animal world will miss him. [[spoiler: When it eventually does happen, it's from every living animal he's met along with Marice who all give him a tearful goodbye.]]

* YearInsideHourOutside: In the end, from Natsu's point, Happy was only sucked up and spat out in a matter of minutes. While the whole series likely took place over several months when Happy was in the animal world.

* ButNowIMustGo: A ForegoneConclusion , Happy knows once his quest is finished, he'll have to leave his newfound friends to get back to his world. Often times being a little too eager to get back that he has to catch himself and remember that the people of the animal world will miss him. [[spoiler: When it eventually does happen, it's from everyone living animal he's met along with Marice who all give him a tearful goodbye.]]

* BittersweetEnding: [[spoiler: Marice is freed from her seal and can control her powers, General Star is defeated and Marice and the animal world residents are finally freed from his threat. With his objective finished, Happy is allowed to return to Earthland. However, the only way Magicia can do so is to transport him back to the same day he was abducted, a process that will wipe out Happy's memory of his time in the animal world. While sadden to hear this, his animal world friends assure him they won't forget him and Happy is convinced that, while he'll lose is memory of them, deep down in his soul a part of him will always remember and cherish his time there.]]

* TheReveal: Though the series we learn there was a human name Marice who has some relevance in the tower though no other humans are mentioned, yet Happy and his friends encounter a few machines (One in the tower and another in Cool Land). After the Holy Kingdom arc, we finally get answers [[spoiler: when Tortoise has Happy transported a thousand years into the past. The animal world Happy finds himself in is actually a parallel world that only Tortoise knows is not their own and in fact, he comes from one that didn't have any magic. He and Marice once lived in an advanced futuristic city called [=ScienCity=]. Marice however was the only one who could harness magic, called "Evolution", which could turn normal animals into anthropomorphic ones. However a cruel general locked her up in a tower, using her power to evolve the animals then breeding them to become soldiers and shipping them off to war to fight for humans while said humans just sit back with no harm to them. The "treasures" Happy quests for: The Smile Heart, Ether Moon and Healthy Crystal, were really Etherois devices meant to help Marice control her power created by a scientist named Dr. Magicia, who resembles the sun face being that sucked up Happy into the animal world in the first place. It's later revealed Marice is actually a artificial human, she was created by Dr. Magicia to be a weapon for said general. When the Beast Musketeers were gravelly injured protecting Happy and Marice from the general. Magicia transported their consciousness into the devices to keep Marice from losing control of her power and they sealed her away so that they could be someday be strong enough to help control her power which could destroy everything if it went out of control. Magicia then fuses with trans-dimensional power and use that to transport the MF animals and the tower to a world where no humans exists where they would build their own society. All the animals there are descendants of the MF animals. As for the statue of Happy that Agi, Boo Boo and he find at the tower, that is really ''Happy frozen in stone'' by Tortoise to take TheSlowPath back to the present day of the story, now with the knowledge and required EXP to free Marice from her seal.]]

* TheReveal: Though the series we learn there was a human name Marice who has some relevance in the tower though no other humans are mentioned, yet Happy and his friends encounter a few machines (One in the tower and another in Cool Land). After the Holy Kingdom arc, we finally get answers [[spoiler: when Tortoise has Happy transported a thousand years into the past. The world Happy finds himself in is actually a parallel world that only Tortise knows is not their own and in fact, he comes from one that didn't have any magic. He and Marice once lived in an advanced futuristic city called [=ScienCity=]. Marice however was one who could harness magic, this one called "Evolution" which could turn normal animals into anthropomorphic ones. However it's revealed that a cruel general found out about her power and locked her away in, using her power to evolve the animals then breeding them to become soldiers and shipping them off to war to fight for humans while said humans just sit back with no harm to them. The "treasures" Happy quests for: The Smile Heart, Ether Moon and Healthy Crystal, were really Etherois devices meant to help Marice control her power created by a scientist named Dr. Magicia, who resembles the sun face being that sucked up Happy into the animal world in the first place. Then comes the reveal that Marice isn't even human, she was created by Dr. Magicia to be a weapon. When the Heart Musketeers were gravelly injured protecting Happy and Marice from the general. Magicia transported their consciousness into the devices to keep Marice from losing control of her power and sealed her away until the danger had passed. Magica then uses his power to transport the MF animals and the tower to a world where no humans exists and from there they built their own society. All the animals there are descendants of the MF animals. As the stature of Happy that Agi, Boo Boo and he find at the tower, that really ''Happy frozen in stone'' by the Tortoise to take TheSlowPath back to the present day of the story, now with the knowledge on how to free Marice from her seal.]]

* CerebusSyndrome: It gets parodied a few times at first, such as Happy comforting a rabbit girl who thinks she's dying, only to discover she just has a cavity, and later saving her from a threatening wolf, only to learn he just wanted to cuddle her and came on too strong. But then it takes a more genuinely, almost [[MoodWhiplash jarringly]] dark tone once Happy uncovers more of the world's past and begins to face more genuinely serious and tragic villains.

* TheReveal: Though the series we learn there was a human name Marice who has some relevance in the tower yet no other humans are mentioned, yet Happy and his friends encounter a few machines (One in the tower and another in Cool Land). After the Holy Kingdom arc, we finally get answers [[spoiler: when Tortoise has Happy transported a Thousand Years into the past. The world Happy finds himself in is actually a parallel world that only Tortise knows is not their own. He and Marice once lived in advanced futuristic city called [=ScienCity=]. Marice however was one who could harness it and had a magic called "Evolution" which could turn normal animals into anthropomorphic ones. However it's revealed that a cruel general found out about her power and locked her away in, using her power to evolve the animals then breeding them to become soldiers and shipping them off to war to fight for humans while said humans just sit back with no harm to them. The "treasures" Happy quests for: The Smile Heart, Ether Moon and Healthy Crystal, were really Etherois devices meant to help Marice control her power created by a scientist named Dr. Magicia, who resembles the sun face being that sucked up Happy into the animal world in the first place. Then comes the reveal that Marice isn't even human, she was created by Dr. Magica to be a weapon. When the Heart Musketeers were gravelly injured protecting Happy and Marice from the general. Magica transported their consciousness into the devices to keep Marice from losing control of her power and seal her away until the danger had passed. Magica then uses his power to transport the MF animals and the tower to a world where no humans exists and from there they built their own society. All the animals there are descendants of the MF animals.]]

* TheReveal: Though the series we learn there was a human name Marice who has some relevance in the tower yet no other humans are mentioned, yet Happy and his friends encounter a few machines (One in the tower and another in Cool Land). After the Holy Kingdom arc, we finally get answers [[spoiler: when Tortoise has Happy transported a Thousand Years into the past. The world Happy finds himself in is actually a parallel world that only Tortise knows is not their own. He and Marice once lived in advanced futuristic city called [=ScienCity=]. Marice however was one who could harness it and had a magic called "Evolution" which could turn normal animals into anthropomorphic ones. However it's revealed that a cruel general found out about her power and locked her away in, using her power to evolve the animals then breeding them to become soldiers and shipping them off to war to fight for humans while said humans just sit back with no harm to them. The "treasures" Happy quests for: The Smile Heart, Ether Moon and Healthy Crystal, were really Etherois devices meant to help Marice control her power created by a scientist named Dr. Magicia, who resembles the sun face being that sucked up Happy into the animal world in the first place. Then comes the reveal that Marice isn't even human, she was created by Dr. Magica to be a weapon. When the Heart Musketeers were gravelly injuried protecting Happy and Marice from the general. Magica transported their consciousness into the devices to keep Marice from losing control of her power and seal her away until the danger had passed. Magica then uses his power to transport the MF animals and the tower to a world where no humans exists and from there they built their own society. All the animals there are descendants of the MF animals.]]

* PortalDoor: In the form of a giant head that eats Happy and transports him to another world.

A Fairy Tail spinoff starring series mascot, Happy.

* ArtShift: Due to not being drawn by Mashima.
* SeriesMascot: Happy, the mascot Fairy Tail, finally gets his time to shine as the main character of his own manga.
* SleeperHit: Of Fairy Tail's many spinoffs, HHA has the most chapters and is still ongoing.
* PortalDoor: In the form of a giant head that eats Happy and transports him to another world.