Breeding in Palworld runs on a simple rule most players never see. Pair a male and a female, and the game averages their hidden breeding value to decide the offspring. That system now treats Tower Boss Pals differently from everything else, and it changes how you plan any breeding chain that involves them.
Quick answer: Tower Boss Pals can no longer be bred with other species. Pair one with a different Pal, and you get no valid offspring. They only produce an egg when bred with the same species, so you cannot use them as a shortcut to pass their passive skills into other Pals.
Which Pals count as Tower Boss Pals
Tower Boss Pals are the partner Pals tied to the game’s tower bosses. When you hover over one in the Pal Box, the breeding lock applies to it even if it carries high-value passives like Immortality, Demon God, Serenity, or Twin-Edged Holy Blade. The table below lists the Tower Boss Pals affected by the change, with their element and breeding rank.
| Pal | Element | Breeding rank |
|---|---|---|
| Grizzbolt | Electric | 8 (Epic) |
| Faleris | Fire | 9 (Epic) |
| Shadowbeak | Dark | — |
| Bastigor | Ice | 8 (Epic) |
| Selyne | Dark / Neutral | — |
| Orserk | Electric / Dragon | 9 (Epic) |
Note: The lock is tied to the Pal’s species, not to its level or passive skills. A Tower Boss Pal with an empty passive list is treated the same as one loaded with meta passives.
How Palworld’s breeding score decides offspring
Every Pal has a hidden breeding score. When you pair a male and a female, Palworld averages the two scores and produces the species whose value sits closest to that average. This is why two unrelated parents can produce a completely different third species.
On top of that base rule, some pairs have unique breed combos that override the average and always produce a set result. Those special combinations are the reason a breeding calculator exists, because you cannot work them out from the score alone.
The Tower Boss lock sits on top of both rules. Because these Pals no longer feed into cross-species math, the calculator will not return any mixed pairing for them. The only combination it recognizes is the same species paired with itself.
What the lock changes for passive skill inheritance
Breeding is the main way to move passive skills onto a Pal you actually want to use. Offspring can inherit passives from either parent, and they can also carry breeding-exclusive active skills that a Pal cannot learn any other way. That is how players build fresh Pals like Ophydia with stacked passives such as Immortality, Legend, Demon God, and Sanctified Meat Shield.
With the lock in place, a Tower Boss Pal can no longer act as the parent that injects those passives into a different species. If you were using one as a carrier for Immortality or God of Destruction, that route is closed. You now need a non-Tower Boss Pal already holding those passives to keep a breeding chain going.
How to check a pairing before you commit
You can confirm the lock in-game by placing a Tower Boss Pal and a different species in the Breeding Farm. No egg appears from that pairing, while a same-species pairing still produces one.
Raid Boss and Legendary Pals are separate
The lock is specific to Tower Boss Pals. Raid Boss Pals such as Xenolord and Blazamut Ryu, along with Legendary and special Pals like Panthalus, Necromus, and Neptilius, have their own breeding rules and are not covered by this same-species restriction. Treat each group on its own when you map out a chain.
The practical takeaway is straightforward. Keep Tower Boss Pals for combat and their partner skills, and build your passive-skill breeding stock from ordinary breedable species. Check any pairing in a calculator first, because a Tower Boss Pal in the mix will simply return nothing.
