The Magic School Bus Meets Earthworm Jim

The Magic School Bus Meets Earthworm Jim is an hour long crossover special featuring characters from The Magic School Bus and the Earthworm Jim television series.

Plot
Grayson, who is the the Terlawk boy genius and head of the Earthworm Jim Fan Club, receives a letter from his cousin, Phoebe and invites  Earthworm Jim, Peter Puppy, Princess What's- Her-Name, Snott and The Hamsternator to Walkerville. They meet Miss Frizzle, Liz, Tim, Arnold, Dorothy Ann, Phoebe, Keesha, Wanda, Ralphie and Carlos, who are at first freaked out by the sight of a talking worm, but Grayson calms them by saying that Earthworm Jim and his friends are their guests. Phoebe is worried about radioactivity clogging up our planet and The Frizz decides to do a field trip to a nuclear power plant where they shrink down to the size of a battery and learn how radiation is made. Meanwhile, Janet, Psycrow, Professor Monkey-For-A-Head, Evil the Cat, Henchrat, Bob the Killer Goldfish, Number Four, Evil Jim, and Queen Slug-For-A-Butt as well as new villains, Major Mucus, Rusty the Snowman, Flamin' Yawn, Chuck and his rabid poodle bulldog, Fifi have decided to team up and use the power plant as a giant mutated robot to destroy the universe. Will our heroes succeed?

Characters and Cast
 The Magic School Bus
 * Lily Tomlin as Miss Valerie Felicity Frizzle
 * Danny Tamberelli as Arnold Perlstein
 * Daniel DeSanto as Carlos Ramon
 * Tara Meyer as Dorothy Ann Rourke
 * Erica Luttrell as Keesha Franklin
 * Maia Filar as Phoebe Terese
 * Stuart Stone as Ralphie Tennelli
 * Andre Ottley-Lorant as Tim Jamal
 * Lisa Yamanaka as Wanda Li

Earthworm Jim
 * Renessa Blitz as Janet Perlstein
 * Malcolm Jay Warner as The Male Producer(The Producer Says Segment only)
 * Dan Castellaneta as Earthworm Jim and Evil Jim
 * Jeff Bennett as Peter Puppy, Narrator and The Hamsternator
 * John Kassir as Snott and Henchrat
 * Kath Soucie as Princess What's-Her-Name
 * Andrea Martin as Queen Slug-For-A-Butt
 * Jim Cummings as Psycrow, Major Mucus, Rusty the Snowman, Chuck and Bob the Killer Goldfish
 * Edward Hibbert as Evil The Cat
 * Charlie Adler as Grayson and Professor Monkey-For-A-Head
 * Frank Welker as Flamin' Yawn and Fifi

Trivia

 * The cold opening of this episode features Jim and Peter tied to a tree and about to be attacked by some Robo-apes that Professor Monkey-For-A-Head built and is commanding.
 * The villain interlude of this episode features Psycrow promoting Super Villain Mart, a reference to Walmart.
 * The Producer Says Segment features Psycrow and Professor Monkey-For-A-Head in place of Liz, trying and failing to gain radioactive powers.
 * This is the official debut of Major Mucus, Rusty the Snowman, Flamin' Yawn, Chuck and his rabid poodle bulldog, Fifi.