The Cloud Castle Egg is the 107th egg that can be bought in Pet Simulator 99. Hatching this egg costs 2.5k 
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Pets included in the Cloud Castle Egg[]
- Cloud Bat (90%)Cloud Bat (90%)
- Cloud Dog (9%)Cloud Dog (9%)
- Royal Cloud Cat (1%)Royal Cloud Cat (1%)
- Royal Cloud Corgi (??)Royal Cloud Corgi (??)