“ | This rootin'-tootin' Ethereal is something of a legend to the scavenging Cybops of the neighboring dimension. Their cycloptic vision and distinctive vocal twang are modeled after the Jellbilly's own. Even though they may never meet face-to-face, Jellbillies generously return every piece of Cybop fan mail they receive, taking advantage of their many tentacles to write several replies at once. | ” |
Jellbilly is a Double-Element Ethereal Monster. It was added to The Colossingum on October 11th, 2023, during Version 4.1.0.
Once Jellbilly has been fed to at least level 5, it can be teleported to The Colossingum from Ethereal Island or Plasma Islet.
Stats[]
Power of Musical Moves[]
Strengths and Weaknesses[]
Effectiveness | Element |
---|---|
Strong against AND Resistant to |
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Strong against AND Resistant to |
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Weak against AND Vulnerable to |
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Weak against AND Vulnerable to |
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Musical Moves[]
Costumes[]
Costume | Requirement | Cost | Move |
---|---|---|---|
![]() Propeller Beanie |
Colossingum Level 27 | 200 ![]() 50 ![]() 75 ![]() |
- |
![]() Think Tank |
Available after teleporting a Jellbilly wearing this costume to the Colossingum | 15 ![]() 22 ![]() |
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![]() Refrain Conductor |
Clear I'm Levitating | 275 ![]() 55 ![]() 82 ![]() |
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Strategy[]
As a Plasma () and Poison (
) Monster, Jellbilly is naturally both strong against Crystal (
) and Poison (
) Monsters and resistant to Crystal (
) and Poison (
) attacks. It is both weak against and vulnerable to Plasma (
) and Shadow (
) Monsters and attacks. Whenever Jellbilly uses Plasma (
) or Poison (
) attacks, it heals itself based on its output damage. Like all Ethereal Monsters, Jellbilly will cease to heal itself after using any ethereal attack five times.
Jellbillies are not good for battling Whisps (or Yooreeks if the Ethereal Workshop monsters releases on the Colossingum), as the only Ethereal elements it has are Plasma () and Poison (
), which are weak against that Monster.
Costume Choices:
- Think Tank replaces its musical attack with a stronger Water (
) attack, granting Jellbilly coverage against all Cold (
) Monsters. It is not as good, however, against a Shellbeat and its derivatives that have Plant (
).
- Refrain Conductor replaces its Poison attack with another musical attack, losing its ability to easily deal with Crystal (
) monsters. Even though this musical attack is stronger than Pocket Drawl, it is not good for battling Whaills (if the Ethereal Workshop monsters release on the Colossingum) and their derivatives that have Shadow (
) becuase even though Jellbilly has two musical moves, its only elemental move is Plasma (
), which is weak against these monsters.
Notes[]

Teaser featuring Jellbilly's Propeller Beanie Costume
- Jellbilly's Propeller Beanie costume was teased in a promotional image for the Hunting High and Low Quest.
- Out of all three of these teased costumes, Propeller Beanie is the only one to be used for a Colossingum Quest, that being Herptile Heroes.
- Jellbilly's Refrain Conductor costume is a train conductor costume with a brown mustache, which further references its similar appearance to a cowboy.
- Its melody also references the original opening theme for Thomas the Tank Engine.
- The name of the costume "Think Tank" might be a reference to Lord Business' Think Tank from The LEGO Movie.
- Jellbilly and Bellowfish are the two Double-Element Ethereals to have Water Element Costumes.
- The Colossingum is the only island where Jellbilly and Cybop meet face-to-face.
- When using Think Tank, Jellbilly plays some notes from the US version of The Office's theme song.
Battle | Quests | Costumes | Versus | Colossingum | Translations |
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