How does the Destiny Knot change IV inheritance?

Without it, an egg inherits 3 random IVs from the two parents. With a Destiny Knot held by either parent, 5 of the 6 IVs are inherited from the parents, dramatically improving the odds of a near-perfect baby.

How is the chance of a perfect egg calculated?

With a Destiny Knot, 5 IV slots are picked from the parents and the 6th is random. The tool computes the probability that all your target IVs land in the inherited slots and that any random slot also rolls a perfect 31.

What does Everstone do for nature?

An Everstone-holding parent passes its nature to every egg with 100 percent certainty. Without it, the nature is one of 25 chosen at random, so each specific nature is a 1-in-25 roll, or 4 percent.

What is the expected number of eggs?

It is the reciprocal of the single-egg success probability. If each egg has a 1-in-32 chance of being what you want, you should expect about 32 eggs on average, though variance means it could be far more or fewer.

How do I breed a flawless 6-IV Pokémon?

Start with two parents that together cover 5 perfect IVs, give one a Destiny Knot, and breed until an egg inherits all 5 and rolls a perfect 31 in the sixth slot. The tool shows exactly how many eggs that typically takes.

Pokémon Breeding & IV Calculator

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Breeding a competitive Pokémon comes down to inheritance probability. This calculator uses the real Destiny Knot mechanic and Everstone nature lock to tell you the chance of a perfect egg and the expected number of eggs you will need to hatch to get your target IV spread.

How it works

With a Destiny Knot, 5 of the 6 IV slots are inherited from the parents and 1 is random. If your parents already hold k of your target perfect IVs across the right stats, the chance an egg inherits all of them depends on which 5 slots are chosen, plus the random slot needing a perfect 31 (a 1-in-32 roll):

inherited slots = 5 of 6 (Destiny Knot) or 3 of 6 (none)
P(all k targets inherited) = C(6−k, 5−k) / C(6, 5)     for Destiny Knot
P(random slot is 31)       = 1 / 32
nature with Everstone      = 1.0,  without = 1 / 25
expected eggs              = 1 / P(success)

Example and tips

Two parents covering 5 perfect IVs with a Destiny Knot give roughly a 1-in-32 chance per egg of a flawless 6-IV baby (the 5 targets are guaranteed in the inherited slots, and the sixth needs a 31). That is about 32 eggs on average. Add an Everstone for a guaranteed nature at no cost to the IV odds. Always breed up from parents that already cover as many target IVs as possible — each extra covered IV shrinks the egg count sharply.