|Original Anime Adaptation:||What's with the Egg?!|
|Remake Anime Adaptation:||The Strange Baby|
|Previous:||The Time Slipper|
|Next:||Is It a Girl? Is It a Boy!?|
The Mysterious Egg, also called Surprise Egg!, is the 11th chapter to the Dr. Slump manga.
Senbei Norimaki, Arale Norimaki and Peasuke Soramame use the Time Slipper to take a trip to the prehistoric ages, where meet a Prehistoric Soramame Ancestor who gives them a mysterious egg in exchange for Senbei's lighter. Back at the Norimaki Residence, the egg hatches Gatchan.