Alvin was the heir of the outcast tribe and was determined to become the new king of the wilderwest. After his mother, Excellinor , was sent to a prison. Alvin went on a search for the "10 lost things", artefacts that would give him the right to become king of all of the Vikings.

A few years later, Alvin falsely befriended a prisoner on Lava Lout island called Humongous who was trapped there trying to steal the fire-stone for his lover. To prove he was still alive for his lover, Humongous asked Alvin to take a bracelet back to his lover, Alvin accepted but kept it for himself since it was one of the lost things. This proved to become Alvin's greatest mistake as it inadvertently led to the birth of Hiccup. (Humongous' lover was Hiccup's mother before she met Hiccup's father who did manage to steal the fire stone from the Lava Louts.)

Four years later, Alvin heard a woman from the Murderous tribe called Termagant had found the coffin of Grimbeard The Ghastly, the last true king of the wilderwest. Inside the coffin was meant to be the dragon jewel, another lost thing and a jewel which is capable of wiping out all dragons if used correctly. Alvin womanised Termagant and even had got her pregnant to manipulate her to find the coffin. When he found the coffin, it was empty except for a lobster claw necklace and then slammed onto Alvin's arm, cutting it off. When Termagant healed his arm and replaced it, Alvin gave her the necklace as a gift before leaving her that broken mentally that she put their kid in a basket to sea, which Alvin never cared about. Years later, Alvin tried to convince the Meathead tribe to help him with finding Grimbeard's treasure since there was a map in the coffin before he got thrown into the coffin and dumped into the sea by the Meatheads.

Discovered by the Hooligan tribe, they freed Alvin from the coffin and agreed to help him with discovering Grimbeard's treasure. When they discover it on Isle of the Skullion's Alvin lets the Hooligan tribe go explore it while not heading onto the island himself. (Skullion's are rabid dragons that are flightless, blind and deaf but have exception smell.) When the Hooligan's escape with the treasure and return to the boat, Alvin reveals himself as the leader of the Outcasts and has his tribe ambush the Hooligans and reveals he's going to enslave them while letting his tribe go to eat their chief and his heir.

After a scuffle which ends up with the boat in fire and sinking and Alvin, Hiccup, Toothless and Fishlegs trapped underneath, they discover a hidden cavern which has a door revealing Grimbeard's true treasure. A fight ensues between Hiccup and Alvin which ends with Alvin getting eaten alive by Grimbeard's final trap, a octopus-like dragon called a Monstrous Strangulator. Although it's revealed in his next appearance that Alvin's alive, the stomach juices made all of his hair fall out and a developing grudge for Hiccup.

Alvin escaped from the treasure caverns and devises a plan with a group of invading romans to incite a war between the Hooligans and Bog-Burglars by kidnapping their heirs and stealing all of the dragons from the inner isles to have a dragon army to help him get the treasure for himself. When the roman's capture Toothless, Alvin has him personally thrown into a cramped cell out of pettiness. When Alvin reveals himself to Hiccup, he plans to kill him before the leader of the roman party, The Fat Consul decides to throw Hiccup and his allies into a gladiatorial arena to see his skills, much to Alvin's disarray. Due to the heavy rain flooding the arena, instead of having Hiccup fight romans, Alvin had the arena be full of sharkworms (hybrid of dragon's and sharks,) to kill the hero's. When the hero's escape, Alvin gives pursuit before it ends with him falling into the arena full of the sharkworms.

Alvin also had left a trap within Hiccup's dragon translating book that he wanted to use to command the dragons, a poisonous dragon that has a fatal sting to anyone it affects. This action was the catalyst for the fourth book as Hiccup was trying to find a cure for the dragon's sting.

Escaping the sharkworms, although losing an eye and a leg in the process, Alvin heard that ,because of the fire stone being stolen from Lava Lout island, the volcano on the island is getting repeatedly volatile. Alvin returned there as a prison guard and spoke to Humongous and told him his lover had died and manipulates him to head to the Hooligan tribe, kill Hiccup and grab the fire stone for him. Because of the volcano getting more volatile, it's causing dragons called Exterminators (think of a dragon with the omnicidal tendencies of a Dalek.)to be released. Alvin intends on using the fire stone to control the exterminators and use them as an army to conquer the lands. In the climax of the film, Alvin attempts to murder the hero's and his old "friend" by unleashing the Exterminators. His plan fails when the fire stone gets thrown into the volcano and frees the fire dragon within, letting it eat all of the Exterminators and Alvin before diving into the volcano. Alvin escaped via using the fire dragon's laughing bubbles to float up and end up on Berserk island.

Alvin doesn't really do much in this book as he's left as acting as the chef for the Berserks. When Hiccup gets captured by the Berserks, Alvin prepares to strangle Hiccup before Hiccup suggests they can escape together with his allies. Alvin proceeds to go with it, before throwing Hiccup in a tree cell with an unknown prisoner, later revealed to be Alvin's own mother. When Hiccup escapes the cell and leaves the prisoner behind, he returns back to his cell to try and release his friends. Alvin decides pick Hiccup and his friends as sacrifices for the beast in the pit of the Berserk's forest. After Hiccup escapes from the pit with the beast, a dragon called Furious who then proclaims that he's going wipe out all human life (I'll discuss him more in the heinous standard,) he sets the forest on fire, forcing everyone to flee. Alvin has a duel with Hiccup on a burning bridge and almost kills him before his mother appears, telling him to save Hiccup because he has one of the lost things, Hiccup's sword. It ends with Alvin and his mother falling into the inferno. Unfortunately they fell into the only lake on Berserk.

In this book, Alvin's mother is more of the human antagonist out of the two but at the end, Hiccup almost gets proclaimed king of the Vikings before it's revealed he had a slave branding on his head. Due to that, Alvin was crowned leader of the Vikings and he then declared that unlike Hiccup, who wanted to introduce peace between humans and dragons, Alvin wanted to initiate war with the dragons and slaughter all of them. He then declares Hiccup and his father Stoick to become slaves. When Hiccup escapes with the map towards the dragon jewel, Alvin declares Hiccup an enemy of the state and orders him to be killed on sight.

Due to the increase in dragons wiping taking over human settlements, Alvin had his men lay traps out that wouldn't just instantly kill them but would leave them to die slowly. Alvin had also tasked Hiccup's mother to hunt down the traitor and claim the map for himself. Taking helm at Prison Darkheart, Alvin had slaves of all ages go out to the marshlands to find the dragon jewel for him, uncaring if they can't return to the prison when the tide rises. His motivator is that he'll give the slave who finds the jewel their freedom but that's revealed to nothing but a lie.

When Alvin realises that Hiccup was possibly in the prison, knowing Hiccup's good hearted nature, he threatened to murder the nearest person near him. This person was one of his own loyal soldiers. When Hiccup escapes in the ensuing scuffle, Alvin decides to do a mass execution on some of the slaves, just to vent some anger out. He's only interrupted when Hiccup's mother returns with Hiccup and the jewel. This causes a rift between the vikings as she explains that Hiccup's end is peace with the jewel while Alvin's is genocide. The story ends with Alvin snagging the jewel off Hiccup when he tries to escape, leaving him with the jewel, but human enemies as well as the dragon foe.

Alvin has started to enslave dragons as well as humans to become weapons of war to help him find the last lost thing and also wiping out the human rebels who strived for peace among everyone. When Hiccup ends up in his cavern lair, Alvin tortures him to reveal the location of the human rebels. He does this by dipping Hiccup in frigid water while letting piranha like dragons eat at him. Hiccup later escapes on a ship with all of the lost things before Alvin sends a raiding party after Hiccup and seemingly kills him while claiming the lost things and is now viable to be crowned the true king of the wilderwest.

Alvin is about to be crowned king and be revealed the secret of the dragon jewel's weapon before Hiccup appears and says that he found the lost things not Alvin. The dragon guardians of Tomorrow vouched for Hiccup to be king. Hiccup then takes the jewel to Furious to try and end the war and initiate peace. Unfortunately the jewel was revealed to be a fake. The real one was in the lobster necklace that Fishleg's had, the same one Alvin left to Termagant all those years back.

When Hiccup attempts to use the real jewel as a peace offering, Alvin and his mother use a stealth dragon and steals the jewel, triggering Furious to attack the humans out of betrayal. Alvin then tries to use the jewel's power, a plague trapped inside that will wipe out all dragons and almost succeeds... until Fishleg's steals it off him. When Fishlegs called him out for the abandonment of someone who loved him, Alvin shows no regret and leaves Fishlegs to find the jewel. However due to Alvin interfering with the truce negotiation, the guardians of tomorrow drag him to the atmosphere and obliterate him, killing him for good.