The WORST episodes of Sonic Underground

Every episode of Sonic Underground ever, ranked from worst to best by thousands of votes from fans of the show. The worst episodes of Sonic Underground!

Sonic, Sonia, and Manic are the children of Queen Aleena Hedgehog, the rightful ruler of Mobius, and are pursued relentlessly by Doctor Robotnik and his bumbling bounty hunters sidekicks, Sleet and Dingo. As infants, the siblings were separated and placed in hiding to fulfill a prophecy made by the Oracle of Delphius that the triplets would grow up to find their estranged mother, overthrow Robotnik, and take their places once more as Mobius' rightful rulers.

Last Updated: 3/31/2026Network: TF1Status: Ended
star
6.33
9 votes

#1 - Underground Masquerade

Season 1 - Episode 5 - Aired 1/20/1999

Sonic and Sonia become concerned after Manic reportedly begins to "backslide to his old ways" when he discovers a band of thieves led by Max. Sleet and Dingo are plotting to avoid giving the taxes they are collecting to Robotnik. They choose Manic to frame for a theft.

star
6.38
8 votes

#2 - Who Do You Think You Are

Season 1 - Episode 8 - Aired 1/31/1999

The Sonic Underground arrive in Tashistan in search of the Queen's Journal. Sonia loses her memory and meets Raphi, one of the town's resistance.

star
6.38
8 votes

#3 - Tangled Webs

Season 1 - Episode 6 - Aired 1/24/1999

Sonic meets up with his friend Cyrus. While Sonic believes that Cyrus has joined the Freedom Fighters, he is actually working for Dr. Robotnik. When he finds out that the Freedom Fighters' "sanctuary" is for children, he destroys Robotnik's communicator. Sonic, Sonia and Manic try to get him away from Robotnik.

Three Hedgehogs and a Baby
star
6.50
4 votes

#4 - Three Hedgehogs and a Baby

Season 1 - Episode 20 - Aired 3/14/1999

While in Mobotropolis, Sonic, Sonia and Manic find an abandoned baby hedgehog. While Sonic and Sonia search for its parents, Manic is left to look after it and utilizes his maternal instincts. The baby is actually a robot and Robotnik almost uncovers the Freedom Fighters' sanctuary.

star
6.50
4 votes

#5 - When in Rome...

Season 1 - Episode 18 - Aired 3/7/1999

As a test of the hedgehogs' intellect and wit, the Oracle strips them of their powers and sends them into an alternate, Roman-themed reality where a Sleet-look-alike presides as Emperor.

star
6.54
13 votes

#6 - Mobodoon

Season 1 - Episode 3 - Aired 1/13/1999

While evading Sleet and Dingo, the hedgehogs find themselves in a town completely untainted by Robotnik where Sonic and his siblings find the people to be nice, and the food is free. After using the Power Stone, the siblings discover that this is where they were born. Manic starts to become attached to the place and reports that this is where he wants to stay.

star
6.57
7 votes

#7 - Winner Fakes All

Season 1 - Episode 11 - Aired 2/10/1999

Robotnik has created a super-fast robot and he's organized a race for the top athletes of Mobius and the robot.

star
6.60
5 votes

#8 - Bug!

Season 1 - Episode 14 - Aired 2/21/1999

The Sonic Underground finds a village that has been destroyed by its Freedom Fighter occupants. The Sonic Underground find that it seems to have something to do with Robotnik's flybots which are all over the desert, as Manic finds out when one of them injects him with a mind-control toxin, making him a slave to Dr. Robotnik.

star
6.75
4 votes

#9 - The Jewel in the Crown

Season 1 - Episode 19 - Aired 3/10/1999

Queen Aleena's Royal Jewel can reportedly trace the location of Queen Aleena. Having apparently found the jewel Sonic, Sonia and Manic think they may have found their mother at last. It is actually a trap to capture Robotnik they've just fallen into.

star
6.75
8 votes

#10 - The Deepest Fear

Season 1 - Episode 7 - Aired 1/27/1999

On a trip to Port Mobius Sonic, Manic and Sonia are told that ships are sinking due to the Mobian sea-beast Moby Deep. The hedgehogs also meet Captain Squeege who informs them of a scam in which the townspeople must rely on Robotnik for protection from the sea monster. In reality it is Robotnik who is sinking the ships. Sonic is urged to overcome his fear of water and the monster to find the truth and end the fears of the seaside town.

star
6.75
4 votes

#11 - Head Games

Season 1 - Episode 17 - Aired 3/3/1999

Queen Aleena tells Sonic, Sonia, and Manic that they are needed in Speedster Island, where they worship stone heads of Mobian hedgehogs. Sonic, Sonia and Manic discover that Sleet and Dingo are scaring the fish away so people who live on Speedster Island move out. Meanwhile, Bartleby wants to turn Speedster Island into a modern resort for wealthy people, with Sleet and Dingo pretending to help. When Sonic, Sonia, and Manic arrive on Speedster Island, Sleet and Dingo capture the hedgehogs, while breaking the promises they made to Bartleby and the people who live on Speedster Island.

star
6.75
4 votes

#12 - The Pendant

Season 1 - Episode 39 - Aired 5/19/1999

While combating Sleet and Dingo in the newly discovered Emerald Peninsula, Sonia finds a magic pendant that threatens to turn her invisible. Sonic and Manic race against time to find the cure to this seemingly irreversible spell before Sonia disappears forever.

The Price of Freedom
star
6.85
13 votes

#13 - The Price of Freedom

Season 1 - Episode 4 - Aired 1/17/1999

Sonia, after getting dirty on one of her missions, drives to East Mobius; Sonic and Manic follow her after receiving news that Queen Aleena had been spotted there. There, Sonia is reunited with her best friend, Mindy LaTour, and her father. Mindy gives Sonia a watch. Unknown to the girls though, the timepiece is a tracking device designed by Robotnik. Sonia finds out, and soon, Mindy's estate is swarming with similar wristwatch-style robots, all being programmed to capture the hedgehogs.

Mummy Dearest
star
7.00
4 votes

#14 - Mummy Dearest

Season 1 - Episode 22 - Aired 3/21/1999

The Sonic Underground journey through the treacherous Mobian desert as they try to locate a hidden temple filled with prophecies of Robotnik's defeat.

star
7.00
4 votes

#15 - The Art of Destruction

Season 1 - Episode 38 - Aired 5/16/1999

The Sonic Underground come across ARTT (Artificial Robot Thought Technology), Robotnik's new robot that can think and learn for itself. ARTT soon learns the power of friendship and switches to the Resistance. This gives Sleet the opportunity to finish off ARTT and the hedgehogs before time runs out.

star
7.00
4 votes

#16 - Bartleby the Prisoner

Season 1 - Episode 37 - Aired 5/12/1999

Bartleby is placed under arrest for helping out the resistance.

star
7.00
4 votes

#17 - Sleepers

Season 1 - Episode 36 - Aired 5/9/1999

Robotnik invents a new dart that induces sleep and sends them after the resistance. The hedgehogs attempt to stop them from the source. Manic is hit by the sleeper darts. After destroying the sleepers, they attempt to destroy the fuel source in the Bad Lands' Mine.

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star
7.00
4 votes

#18 - The Big Melt

Season 1 - Episode 35 - Aired 5/5/1999

What started as a vacation for Sonic, Sonia and Manic gets ruined by Dr. Robotnik when he comes up with a plan – to melt the polar ice caps. Sonia gets split up from the group and mistaken for Queen Sauna by a group of penguins who are having troubles of their own.

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star
7.00
4 votes

#19 - Sonia's Choice

Season 1 - Episode 34 - Aired 5/2/1999

Robotnik is about to auction four royal goblets in Anèz. When the hedgehogs take the goblets back, Sonic and Manic are captured. At both ends of the city are Roboticizers with one of Sonia's brothers inside.

star
7.00
4 votes

#20 - Healer

Season 1 - Episode 33 - Aired 4/28/1999

A Mobian named Titus creates a machine that can de-robotisize robots called the De-Roboticizer.

star
7.00
4 votes

#21 - Dunes Day

Season 1 - Episode 21 - Aired 3/17/1999

The Sonic Underground come across a nomadic tribe whilst journeying through the desert. Manic claims to not trust the tribe's leader "Ifyoucan". He sets off to find out the truth and uncovers a shocking secret.

star
7.00
5 votes

#22 - Sonic Tonic

Season 1 - Episode 15 - Aired 2/24/1999

Using the essence of a rare plant, Robotnik manages to create a potion that could grant Sleet and Dingo the ability to run at the speed of Sonic, but it turns out to have troublesome side-effects just after Sonia and Manic take the serum themselves.

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star
7.00
7 votes

#23 - Come Out Wherever You Are

Season 1 - Episode 10 - Aired 2/7/1999

Bartleby, with the aid of Robotnik, invites Sonia to the Debutante Ball. Meanwhile, Robotnik comes out with the Predator, an aircraft that will capture and robotisize all members of the resistance. When the resistance hijacks the craft, Sonia is chosen to lead the captured members of the resistance to safety.

star
7.14
7 votes

#24 - The Last Resort

Season 1 - Episode 9 - Aired 2/3/1999

While escaping from Sleet and Dingo, Sonic, Sonia, and Manic come across Lake Valley Resort. Lake Valley Resort is led by Stripes, who believes that making deals with Robotnik is safer than fighting Robotnik. When Robotnik asks if there are any new people staying at Lake Valley Resort, he reveals that Sonic and Manic are there, leaving out Sonia.

star
7.20
5 votes

#25 - Artifact

Season 1 - Episode 13 - Aired 2/17/1999

In order to raise money for his own cause, Robotnik auctions off artifacts from the lost city of Mobupinchu. But these artifacts are actually bombs, and they are about to go off.