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Sonic Underground Season 1 Episode 15

Sonic Tonic

A speed enhancing fluid deemed Sonic Tonic is created by Robotnik to make him as fast as Sonic so that he may finally catch him. Robinik's plan is successful and Sonic is captured, yet when Dingo begins to feel the side effects of the tonic, Sonic is able to make a run for it with a vial of the tonic in tow. Unaware of the side effects of the tonic, Manic and Sonia, envious of Sonic's speed, decide to use the tonic on themselves.

Sep. 17, 1999

1 - 40
Virtual DangerOct. 22, 1999
1 - 39
The PendantOct. 21, 1999
1 - 38
The Art of DestructionOct. 20, 1999
1 - 37
Bartleby the PrisonerOct. 19, 1999
1 - 36
SleepersOct. 18, 1999
1 - 35
The Big MeltOct. 15, 1999
1 - 34
Sonia's ChoiceOct. 14, 1999
1 - 33
HealerOct. 13, 1999
1 - 32
Haircraft in SpaceOct. 12, 1999
1 - 31
Country CrisisOct. 11, 1999
1 - 30
Harmony or Something (Origins, Part 3)Oct. 08, 1999
1 - 29
New Echidna in Town (Chaos Emerald Crisis, Part 3)Oct. 07, 1999
1 - 28
Getting to Know You (Origins, Part 2)Oct. 06, 1999
1 - 27
No Hedgehog Is an Island (Chaos Emerald Crisis, Part 2)Oct. 05, 1999
1 - 26
Wedding Bell BluesOct. 04, 1999
1 - 25
Flying Fortress (Chaos Emerald Crisis, Part 1)Oct. 01, 1999
1 - 24
Six Is a CrowdSep. 30, 1999
1 - 23
Hedgehog in the Iron MaskSep. 29, 1999
1 - 22
Mummy DearestSep. 28, 1999
1 - 21
Dunes DaySep. 27, 1999
1 - 20
Three Hedgehogs and a BabySep. 24, 1999
1 - 19
The Jewel of the CrownSep. 23, 1999
1 - 18
When in Rome...Sep. 22, 1999
1 - 17
Head GamesSep. 21, 1999
1 - 16
Friend or Foe?Sep. 20, 1999
1 - 15
Sonic TonicSep. 17, 1999
1 - 14
Bug!Sep. 16, 1999
1 - 13
ArtifactSep. 15, 1999
1 - 12
A Hedgehog's Home Is Her CastleSep. 14, 1999
1 - 11
Winner Fakes AllSep. 13, 1999
1 - 10
Come Out Wherever You AreSep. 10, 1999
1 - 9
The Last ResortSep. 09, 1999
1 - 8
Who Do You Think You AreSep. 08, 1999
1 - 7
The Deepest FearSep. 07, 1999
1 - 6
Tangled WebsSep. 06, 1999
1 - 5
Underground MasqueradeSep. 03, 1999
1 - 4
The Price of FreedomSep. 02, 1999
1 - 3
MobodoonSep. 01, 1999
1 - 2
To Catch a QueenAug. 31, 1999
1 - 1
Beginnings (Origins, Part 1)Aug. 30, 1999