Fangbone and Bill skip the research for their project on swamps and just capture a bunch of creatures for a 'swamp-bucket' instead. But when the toe accidentally falls in, the school gets transformed into a swamp. Only through books can they get the school back to normal and save Ms. Gillian from life as a giant mutant frog!

After nearly losing the toe, Bill’s wracked with guilt and questions whether he’s right to help Fangbone protect the Toe and keep the world safe. Worse, a Skullbanian thief, CID, takes advantage of Bill’s lack of confidence as he and Fangbone face Drool’s most relentless foe, the Duck of Always. Fangbone and Bill face their most relentless foe yet - The Duck of Always, a duck cursed with immortality which can never die or stay destroyed and can also talk. Worse, Cid attacks at the same time and steals the Toe. It’s only when Bill realizes that giving up is the only thing to fear, that he comes up with a plan to defeat the Duck and Cid together.

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Fangbone decides to whip the kids into fighting shape by teaching them CLOBBERBALL, a painful Skullbanian game. But when Drool challenges their team, Fangbone learns that his classmates have different kinds of strength.

Photo day goes badly wrong when the Toe transforms Fangbone in Fred Bone – a tie-wearing, utensil using fancy boy! Fangbone saves the Toe, but loses himself – at least until Bill photo-shops a cure.

When Fangbone's class goes on a field trip to Skullbania, he is given a once-in-a-thousand-year chance to destroy the Toe of Evil. But, when Fangbone must choose between destroying the Toe and saving his friendship with Bill, he must make an impossible choice.

When Bill's Mom accidentally spots Fangbone and Bill fighting Drool's Razorworm, she decides on a harsh punishment.

Bill learns that taking shortcuts with his magic talent can have serious consequences.

Bill's got the perfect gifts for his mom's birthday, but it all goes terribly wrong when Drool's Feather-Phoenix attacks, forcing him to choose between saving the Toe and saving his mom's birthday gifts.

When one of Drool's monsters attacks with a magical sword, Fangbone and Bill stop him with their beloved waffle iron.

The Toe accidentally create a young Drool and Fangbone and Bill take it as an opportunity to turn Drool good.

When Fangbone becomes addicted to Munchie-Kat, a cheesy video game, Drool brings it to life to consume Fangbone's waking hours.

At parent-teacher night, Fangbone and Bill are forced to pretend Twinkle-stick is Fangbone's totally normal human parent.

When Cid shows up to steal the Toe, Fangbone and Bill capture her, only to discover that the Shadowsteppers sent more thieves to finish the job.

After Bill accidentally melts Fangbone's most precious sword, he lies about it and accidentally summons the Hound of Hounding, a Skullbanian demon dog.

After hearing stories of Fangbone's battle victories, Hammerscab, a barbarian warrior, travels to Earth to test her strength against his.

After the Toe becomes magically attached to Bill's forehead, he finds himself slowly turning green.

When Bill and the kids take Fangbone to Mallhala to buy new clothes, Drool unleashes his Pigataur to take the Toe.

Bill lies to Drool and tricks him into falling into the Nightlands, and he and Fangbone think they've defeated the evil wizard forever.

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Fangbone attempts to train the kids in Skullbanian outdoor survival by taking them camping in the park.

Bill gets a former Drool-keeper to help Fangbone relax.

Fangbone and Bill take control of Clapperclaw and Grimeblade's huge barbarian bodies.

After Fangbone and Bill discover Cid living in Cavebania, Drool sends his DIRE RAZORWORM to devour them all.

Fred Bone returns when Fangbone splits himself in two, recreating his upper class double to take his place at school.