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| Series | Adventures of Sonic the Hedgehog (“AoStH”), first-run syndication |
| Episode | Episode 2 of 65 in production order (code 238-102) · aired 9th · WildBrain no. 102 |
| First aired (US) | 16 September 1993 · syndication |
| Written by | Robert Askin |
| Directed by | Kent Butterworth |
| Sonic Says | Sharing |
| Previous | Super Special Sonic Search & Smash Squad |
| Next | Lovesick Sonic |
Marble ZoneGuest: Spelunk
Subterranean Sonic is episode 2 of Adventures of Sonic the Hedgehog in production order (production code 238-102), the order used by the DVDs, WildBrain’s official uploads and our episode guide. It was the 9th episode to air in the 1993 syndicated run, on 16 September 1993. It was written by Robert Askin and directed by Kent Butterworth.
Synopsis
Robotnik’s hedgehog detector spots Sonic in the Marble Zone, and Scratch and Grounder are catapulted in to grab him. Sonic and Tails escape down a geyser into a maze of underground tunnels – with the robots close behind.
Down below lies a cavern stuffed with gold and gems, guarded by Spelunk, a miserly mole who is convinced that everyone is out to rob him. He chases the pair through his mine on a runaway minecart, and when they nearly reach daylight he flattens the stairs beneath them and drops them into a cage made of diamondius, the hardest substance on Mobius.
It takes Robotnik to change Spelunk’s mind. When the doctor’s forces barge into the mine looking for Sonic, they free the prisoners by accident, and the mole realises the hedgehog is the only one who can protect his riches. Sonic and Tails help drive the invaders out, and Spelunk learns a little about sharing.
Key Moments
- A geyser in the Marble Zone becomes Sonic and Tails’ escape hatch.
- Sonic plays crossing guard to stop Spelunk’s minecart for a family of turtles.
- A cage of diamondius proves too tough even for Sonic.
Sonic Says
Sonic and Tails talk about sharing – with friends, family and everyone else.
Every episode’s segment is listed on the series page.
Trivia
- The Marble Zone takes its name from the first Sonic the Hedgehog game.
- Robert Askin also wrote High Stakes Sonic, Robotnik, Jr., Full Tilt Tails and Sonic the Matchmaker.
Watch the Episode
The full episode, from WildBrain’s official WildBrain Hero Tower channel on YouTube (checked 6 November 2026).
Part of our Adventures of Sonic the Hedgehog episode guide. See the series page for the show’s history, cast, Sonic Says and home video.
Sources: production code, air date and writer from Sonic Wiki Zone’s episode list (codes from the US Copyright Office record), Wikipedia and Sonic Retro (Wayback copy), cross-checked against Luke’s 2017 list and the on-screen title card; synopsis written for Sonic Scene from the episode and these summaries; title card via Sonic Retro and screenshots via Sonic Wiki Zone, copied to our media library.