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| Series | Sonic Underground (DiC, 1999) |
| Season | Season 1 (the only season) |
| Episode | Episode 24 of 40 (production order) · production no. 424 · WildBrain no. 124 |
| French title | Monde parallèle |
| First aired (France) | 28 March 1999 · TF1 |
| First aired (US) | 30 September 1999 · BKN Kids II (syndication) · 24th in US broadcast order |
| Written by | Len Janson |
| Directed by | Marc Boreal, François Hemmen and Daniel Sarriet; Tom Smith (US) |
| Song | “I Can Do That for You” |
| Previous episode | Hedgehog in the Iron Mask (S01E23) |
| Next episode | Flying Fortress (S01E25) |
Alternate dimensionEvil doublesRobotnik the hero
Six Is a Crowd is episode 24 of Sonic Underground, DiC’s 1999 cartoon about Sonic, Sonia and Manic, the hedgehog triplets of Queen Aleena. It is number 24 in production order – the order TF1 first showed the series in France, where it premiered on 28 March 1999 – and it was the 24th episode to air in the United States, on 30 September 1999. It was written by Len Janson, and its song is “I Can Do That for You”.
Synopsis
The Oracle of Delphius sends the siblings into another dimension, where they find a gleaming city full of bowing citizens and statues of themselves. The local Freedom Fighters capture them at once and take them to their leader: Robotnik.
In this world everything is reversed. Robotnik is the hero, and the hedgehogs’ doubles are selfish rulers: an overfed King Sonic, a tax-mad King Manic and a cruel Queen Sonia who jails whole families, and none of them plays music any more. When the rebels see that their prisoners are different, the band proves it with a song.
Disguised as themselves, the heroes slip into the palace and take on their doubles. Sonic beats his in a fair race, Manic vacuums up his twin’s loot and Sonia fools hers with a fake mirror. Then they show the rulers what their greed has done. On the way home Sonia hears her mother’s voice, warning that power can corrupt anyone.
The Song: “I Can Do That for You”
“I Can Do That for You” is the band’s offer of help to a world where the hedgehogs are the villains.
Key Moments
- Robotnik leads the Freedom Fighters in the alternate world.
- The siblings face spoiled, tyrannical versions of themselves.
- Queen Aleena’s voice warns Sonia that power corrupts.
Trivia
- Written by Len Janson, who also sent the siblings to an alternate world in When in Rome….
- The evil doubles have given up music, the one thing the real siblings never let go of.
- The French title, Monde parallèle, means “parallel world”.
Watch the Episode
The full episode, uploaded by WildBrain’s official Sonic The Hedgehog – WildBrain YouTube channel (checked 6 November 2026).
Part of our Sonic Underground episode guide. The series page covers the characters, the songs, the prophecy and the show’s history.
Sources: titles, writers, songs and air dates from Luke’s original Sonic Scene guide, cross-checked with Wikipedia, Sonic Wiki Zone and Sonic Retro (Wayback copy); synopsis written for Sonic Scene from the episode, its official description and several fan references; title card and screenshots via Sonic Wiki Zone, copied to our media library.