Scalpasc the toxic planet which is home to the blowfish-like Sphoeroids.
Scalpasc have an atmosphere which is cover extremely poisonous noxious fume which. The ground within the planet is made out of solid soil and mud as it is an extremely Rainy planet. The planet is extremely impossible to survive but those in have adapted to survive the harmful toxic gases within it. Almost everything is acid and toxic from the water, to the storm, etc.
The only known creature who are in the planet the Sphoeroid who survived due to the fact that they have no nostrils to smell and have high immunity to the toxicity and acidity of their homeworld.
Scalpasc is currently destroyed by Malware and his Negative 10: only more than 455 Sphoeroid have been save. Thank to the Plumbers, they have hope to find a new home just like their original planet.

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Cinos' Plumber Database
FanfictionHere are the many Ben 10 related characters, location, and alien species that are part of my Sonic Expanded Universe. Notes: Not all of the Ben 10 characters are listed. Character owned by Cartoon Network, Warner Bros, and Man of Action.