The “Expected Hatches Needed” number tells you, on average, how many eggs you’ll likely need to incubate before one hatches with every passive skill you selected. It’s a statistical average — some players get lucky on egg #1, others need more attempts. Use it to plan how many incubators and how much breeding time to budget.

We model each desired passive skill as an independent inheritance event with an estimated ~30% pass-through chance per slot (a commonly observed community benchmark, not an exact game-coded value). The combined probability of hatching a child with all N target passives is approximately 0.30^N, adjusted slightly for parent power tier synergy. Expected attempts = 1 ÷ probability, using the geometric distribution — the standard statistical model for “how many tries until first success.”

The recommendation engine below weighs your probability score against typical player patience thresholds. Under 10 expected eggs is considered a fast, efficient breeding project. Between 10–30 is moderate and benefits from running multiple pairs in parallel. Above 30 expected eggs usually means narrowing your passive target list will save significant time.