Today (Nov 23, 2020) i discovered that there are six new hybrid pet bears, but they are not included in the pet tomb count. So far I have obtained 2 of these new pets, and my hybrid pet count is now 158/156.
Are there other hybrid pets not yet included in the hybrid pet total?
Nov 24, 2020 update: hybrid count has been updated, my tomb now reads 159/162 (3 more hybrid bears left for me to hatch)
Upon reading every hybrid wiki I could find, it seems like certain Level 118 quest hybrids are disabled or straight up missing/uncoded into the game, which is unfair since hatching some of the 118 pets together can make two different pets, like the Ornery Kookaburra/Courageous Bull Hybrids, Noble Kookaburra/Lively Opossum, Clamoring Ghulture/Acid Rain Core, Arcane Golem/Frosty Eye hybrids.