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Dr. Cumulo Nimbus is the villain of the Poptropica Blimp Mini-Quest, which comes with the inflatable blimp toy.
At some point prior to your quest, Dr. Cumulo Nimbus created a blimp that he uses to terrorize the citizens of Poptropica. You must defeat him on three levels in order to complete the Poptropica Blimp Mini-Quest.
- His name is a pun on the word "cumulonimbus", which is the scientific name for a storm cloud.