| Looks like one of Jimmy Neutron's incomplete inventions A.K.A a Stub.|
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- The word "yolk" means the center of an egg (which explains how the Yolkians are in egg-shaped shells).
- When the Yolkians lose their egg shell, their real bodies (which look like green slime) leak out and are extremely vulnerable.
- Yolkus is a parody of the Death Star.
- The markings on the planet are similar to Coruscant.
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