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| Series | Adventures of Sonic the Hedgehog (“AoStH”), first-run syndication |
| Episode | Episode 23 of 65 in production order (code 238-123) · aired 10th · WildBrain no. 123 |
| First aired (US) | 17 September 1993 · syndication |
| Written by | Doug Molitor |
| Directed by | Kent Butterworth |
| Sonic Says | Using your brain |
| Previous | Pseudo Sonic |
| Next | Tails in Charge |
Grounder episodeGenius chipGuest: Hacker
Grounder the Genius is episode 23 of Adventures of Sonic the Hedgehog in production order (production code 238-123), the order used by the DVDs, WildBrain’s official uploads and our episode guide. It was the 10th episode to air in the 1993 syndicated run, on 17 September 1993. It was written by Doug Molitor and directed by Kent Butterworth.
Synopsis
Robotnik is downloading a genius program onto a chip that will make him ten times smarter, while Scratch and Grounder try to lure Sonic into a giant mousetrap baited with a talking Tails doll. It goes the way their traps always go.
The chip goes astray when Hacker, a young computer-whiz friend of Sonic and Tails, gets hold of it. In the scuffle that follows Grounder is smashed to pieces, and when he puts himself back together, the chip ends up inside him. The dimmest robot on Mobius is suddenly a mastermind.
Genius Grounder builds a ray that petrifies Sonic, then starts bossing Robotnik around in his own fortress. With the hedgehog out of action, it is up to Tails and Hacker to outthink the new and improved Grounder and bring Sonic back.
Key Moments
- A giant mousetrap baited with a talking Tails doll.
- Grounder rebuilds himself – with the genius chip inside.
- Sonic turned to stone; Tails and Hacker to the rescue.
Sonic Says
Sonic’s advice: use your brain – think things through before you act.
Every episode’s segment is listed on the series page.
Trivia
- One of the six episodes released on US VHS by Buena Vista in 1994 (see the series page).
- Doug Molitor also wrote Coachnik and Sonic is Running.
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.