Passive inheritance is handled through breeding by choosing parents with desirable passives and repeating the process until the child inherits the target traits.
Palworld 1.0 discussion also highlights Special Cakes and passive mutation behavior, so this page should keep wording practical instead of promising fixed odds.
Choose parents that already carry the passives you want, then breed repeatedly until the child lands close to the desired combination. This is a planning problem as much as a luck problem, because cleaner parent pools make the outcome easier to manage.
Yakumo is useful for passive-focused planning because it helps players think beyond a single child route. When the goal is a polished passive set, the route that preserves useful traits can be better than the route with the easiest parents.
Community discussion around Palworld 1.0 mentions passive changes and specialist cakes, but exact inheritance behavior should be checked against current data before publishing hard probability claims.
Yakumo is valuable in Palworld 1.0 because players use it when planning passives and hunting stronger trait outcomes through breeding and encounters.
GroundAnubisAnubis is still a top target for breeding because of its handiwork value and combat utility, but Palworld 1.0 changed enough breeding data that older Penking + Bushi style routes should not be reused blindly.