The mystery egg on Jurassic World Bitzee doesn’t appear to have a confirmed official drop rate, and the online discussion I found suggests it feels uncommon rather than truly “ultra-rare”. One player described getting secret dinos after finishing the arenas and speculated the result may be around 50/50 in that specific unlock step, but that’s anecdotal rather than an official rate.

What people are seeing

  • Some players report the mystery egg taking a long time to appear or hatch, which makes it feel rare.
  • The official Bitzee Jurassic World page confirms there are 25 dinosaurs to unlock, but it does not list rarity odds for the mystery egg.
  • Because there’s no published probability from the brand in the sources I found, the safest answer is that rarity is not publicly confirmed.

Practical read

If you’re asking whether it’s “one-in-a-hundred” rare, I wouldn’t assume that from the current evidence. Based on player reports, it sounds more like a special unlock tied to progression than a random jackpot item.

Bottom line

At the moment, the mystery egg looks hard to get for some players, but not verified as extremely rare. The best-supported answer is: unknown official odds, with community reports suggesting moderate rarity.

TL;DR: No official rarity number seems to be public; community chatter points to “somewhat rare,” not proven ultra-rare.