Lore

Huge Vege-tale spoliers ahead.

Pre Vege-tale
Years ago before the events of Vege-tale Dabuigme, a demon, was exiled from hell due to being too incompetent, this sent him to a mysterious void where he lost all of his body except for his arms, spinal cord, and an eyeball, yet he still had some of his power. He built himself some robotic parts to replace his lost torso and his hands, months later he found an escape from the void, a portal to a small planet inhabited by lots of plants and few animals. He decided to keep this planet to himself and built the PGM-600, a large robotic machine made to release very lethal poison onto the planet killing 86% of all the plants. Because of this, ancestors of the Vegelens and other species moved to Tutum Mountain, to be high up enough to avoid the lethal gas.

During Vege-tale
After talking to Turnip Boy, Pame gets a notice from Ternam, citizens of Dangelow Swamp have noticed the gas has been rising and consuming more parts of the mountain. Pame decided to go investigate the case of why is the poison rising, she decided to take Turnip Boy and Ternam with her to assist her in her case.

While the gang goes to Dangelow Swamp they are attacked by Aranea, a giant demonic spider, Pame and Ternam get stuck on the webs but Turnip Boy manages to defeat Aranea and free his friends.

After arriving at Dangelow Swamp one of the villagers tells the gang that the poison mist has been rising, one villager suggest taking a sample from the poison and taking it to a scientist in Magmarium for a scientist to inspect it.

After going to Mt. Permafrost to walk their way to Magmarium, they are attacked by Yeetly, a demon resembling a yeti, the gang uses landmines to defeat him and make their way to Magmarium.

In Magmarium a scientist known as Scien examines the gas but cant find any evidence for its origin and requests that you go to Crystal Sub Terra for a alchemist to study it.

In Crystal Sub Terra, the gang tries looking for an alchemist but they are unsuccesful. After exploring deeper they find a temple with many runes depicting a strange skeleton figure using gas to force ancient species into the mountain, as they are exploring the temple they are attacked by Teseract, after defeating him he turns from red to blue and flies away not before saying "thanks". The gang follows him outside but cant find him. They decide to go to Octo-Beach to ask if the Pupos know anything, Ternam refuses, but Pame insists.

In Octo-Beach they find that the Pupos are scared of a mysterious voice, then Sirena, a mermaid with long hair, emerges from the water and claims she is saving the ocean from the Pupos. Pame refuses to believe the Pupos are evil but then an Anti-Demon Amulet is blown by the wind and into the forehead of Sirena, Sirena being a demon is harmed by this amulet and reveals she is a half-mermaid demon created by Dabuigme, that attacks the gang, and flees into the deep ocean.

The gang follows Sirena deep into her underwater temple and have a fight with her, they use plasma orbs to damage her after an intense fight, Sirena acts dead and the gang swims to the surface for air but Ternam's leg is grabbed by Sirena and dragged deep into the ocean, Pame and Turnip Boy go save Ternam. After fighting and actually defeating Sirena, they swim to the surface and take Ternam to the hospital, where Leva says they will need 3 times to cure Ternam, a gravedilion, neon honey, and a vanilla flower

The gravedilion is found in Rainy Graveyard, the neon honey is found in Neon Disk City, The vanilla flower is found in Vanilla Peaks. After the player gets all 3 items Leva can cure Ternam, Ternam then has a sudden urge to go to Dandy Dunes where they plan to go inside one of the pyramids where they plan to get information on whats happening, since the pyramids have many information of things that happened, are happening or are going to happen, they plan to enter a pyramid but they acidentaly awaken Spyngh a small girl with a pyramid hat which can activate a giant robot which she uses as a body

They then defeat Spyngh and find a piece of information that tells them the location of the PGM-600 the machine which causes the deadly gas

Our gang then go to Dangelow swamp and equip some Hazmat suits to travel and deactivate the PGM-600 but a person alerts them that the hazmats suits will only grant them 3 hours before the suit is damaged by the gas

After traveling inside of the green fog they travel across the land to try and find the PGM-600 They then manage to find the machine and deactivate it

After the deactivation of the PGM-600 Dabuigme becomes aware of this

Outside of Vegetale
During the time Turnip Boy is fighting Teseract, in Octo-Beach, the Scorching Queen (a fire demon) wants to dry up all the water and turn Octo-Beach into a desert, but the Pupos fight her using water guns which defeat her thus destroying one of the six PGM's guardians.