The brand new Christmas 2025 event is now live with the latest Build a Zoo Update 45. Here are the new codes, content additions, changes, and more in this article covering the update notes.
BUILD A ZOO UPDATE 45 CHRISTMAS EVENT
Summary: Update 45 introduces the limited-time Christmas Event featuring new weather, mutations, Christmas pets, a Christmas Mutant Egg, and multiple exclusive rewards. The store receives new Elite Pet Passes and a seasonal bundle, Big Pet level caps have increased, a new hidden pet has been added, and new Ocean Eggs and pets are now available. Additional in-game optimizations round out the update.
CHRISTMAS LIMITED-TIME EVENT
- Christmas weather now appears during the event, enabling special Christmas mutations.
- Christmas weather provides a chance to obtain a Christmas Mutant Egg.
- New Christmas rewards include an exclusive Title, Home Board, Christmas Carol field, and themed foods.
- Players can earn brand-new Christmas pets and Christmas eggs through event participation.
STORE UPDATE
- Two Elite Pet Passes added:
- One speeds up evolution.
- One increases the maximum pet placement count.
- Limited-time Christmas Bundle includes Christmas event eggs and Christmas fruits.
- Store now features a jump-to-category navigation function.
BIG PET LEVEL CAP INCREASE
- Big Pet maximum level increased to 380.
- Big Fish maximum level increased to 110.
HIDDEN PET
- A new secret pet has been added to the hatch pool and may appear unexpectedly during hatching.
OCEAN EXPANSION
- New Ocean Eggs added.
- New Ocean Pets available to discover and collect.
ADDITIONAL OPTIMIZATIONS
- Various in-game systems and UI displays have been refined for smoother play.
New Codes
Build a Zoo Christmas Event Update (UPD 45) was released, featuring a brand-new code: CHRISTMAS12. For older codes, check out Build a Zoo Codes tracker page.
So that’s it for now in this post on Build a Zoo Update 45: New Codes, Christmas Event, and More.