Players want “perfect passives in one click.” The honest split: species is look-upable; traits and IVs roll in-game.
Species vs traits
The matrix answers which species two parents produce. Trait pools, inheritance counts, and rainbow passives are separate RNG systems that cakes may influence.
Why we refuse fake certainty
Hard-coded “guaranteed” passives misprice breeding effort. We state the boundary in results and here instead of shipping unreliable guarantees.
What you can do
Lock species and parent sets with forward/reverse tools; use cake/mutation guides for efficiency and high-risk loops; roll traits in-game.
Tool boundary
Species comes from the 1.0 matrix. If trait rules change via patches or datamines, we update the boundary story before inventing brittle predictors.