Sonic Underground
S01E15 Sonic Tonic
Title: Sonic Surge Plot: Robotnik devises a new formula called Sonic Surge, designed to boost his speed to match Sonic's, enabling him to finally capture his rival. His scheme works initially, and Sonic falls into his trap. However, when Dingo starts experiencing the tonic's adverse effects, Sonic seizes the opportunity to escape, taking a vial of the serum with him. Meanwhile, unaware of the tonic's dangers, Manic and Sonia, jealous of Sonic's incredible speed, choose to try the tonic for themselves in hopes of gaining the same abilities.
Season 1 Episodes
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2
3
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Beginnings (Origins, Part 1)
To Catch a Queen
Mobodoon
The Price of Freedom
Underground Masquerade
Tangled Webs
The Deepest Fear
Who Do You Think You Are
The Last Resort
Come Out Wherever You Are
Winner Fakes All
A Hedgehog's Home Is Her Castle
Artifact
Bug!
Sonic Tonic
Friend or Foe?
Head Games
When in Rome...
The Jewel of the Crown
Three Hedgehogs and a Baby
Dunes Day
Mummy Dearest
Hedgehog in the Iron Mask
Six Is a Crowd
Flying Fortress (Chaos Emerald Crisis, Part 1)
Wedding Bell Blues
No Hedgehog Is an Island (Chaos Emerald Crisis, Part 2)
Getting to Know You (Origins, Part 2)
New Echidna in Town (Chaos Emerald Crisis, Part 3)
Harmony or Something (Origins, Part 3)
Country Crisis
Haircraft in Space
Healer
Sonia's Choice
The Big Melt
Sleepers
Bartleby the Prisoner
The Art of Destruction
The Pendant
Virtual Danger