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Someone's filling the sewers with alligators, which are making their way to people's toilets.

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Sloppy Joe opens a fast-food joint with portions so big that half the food is thrown away, creating a garbage overload in the city.

The Grossologists tangle with a former hair stylist who has a space satellite that could make everyone in the world go bald.

Sloppy Joe creates a body-odor epidemic during a heat wave.

Roger Pinkeye uses smelly cheese to create a monster out of mold.

Lance Boil drops an allergy bomb at a carnival.

A major case of acne spreads through Ringworm High.

We don't have an overview translated in English. Help us expand our database by adding one.

We don't have an overview translated in English. Help us expand our database by adding one.

An exclusive spa opens and customers are raving about its fancy bath products, but they're all bug-based and created by Insectiva, the insect queen.

A disgraced opera star is set on revenge and plans to blow everyone away with destructive burps.

A candy man comes to town with treats that cause bad breath.

A mechanical swamp monster is causing power outages all over the city.

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Abby notices that holiday cheer is lacking during the Christmas season, especially with Sloppy Joe playing the local Santa.

Ty and Abby recall their early days as Grossologists.

Roger Pinkeye kidnaps Lance Boil, hoping to use him to get all the Grossology secrets.

We don't have an overview translated in English. Help us expand our database by adding one.

We don't have an overview translated in English. Help us expand our database by adding one.

Little pet snakes are sold all over town before they morph into deadly beasts.

Frederick Follicle returns to town, bringing a hairy epidemic with him.

Fartor returns with an explosive plan to send a gassy meteor on a collision course with Earth.

Darko Crevasse returns with an army of zombie roadkill animals, and he's on a mission to ruin Halloween.