How does the Destiny Knot affect IV inheritance?

Without it, three of the six IV slots are passed down from a random parent each and the rest roll randomly. A Destiny Knot raises that to five inherited slots, so far more of the parents' good IVs carry over to the egg.

Why should parents not share the same perfect IVs?

Each inherited slot copies one random parent's value for that stat. If both parents are perfect in a stat the slot is perfect either way, but spreading distinct perfect IVs across the two parents covers more stats and raises the overall odds of a flawless egg.

What does expected perfect IVs mean?

It is the average number of stats out of six that will come out perfect in a single egg, summed from each stat's individual probability. Higher is better; a strong parent pair with a Destiny Knot often averages four to five perfect IVs per egg.

How many eggs do I need for a 6IV?

The tool multiplies the per-stat perfect odds to get the chance all six are perfect in one egg, then inverts it to estimate eggs needed. With well-chosen parents this can be a few dozen to a few hundred eggs rather than thousands.

Does this model natures or hidden abilities?

No — it focuses on IV inheritance, which is the part most affected by parent selection and the Destiny Knot. Natures and abilities follow separate inheritance items and are not included here.

Minecraft Breeding & IV Calculator

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Breeding for perfect IVs is a numbers game, and good parent selection changes the odds enormously. This calculator takes each parent’s perfect stats and tells you the offspring’s real chances, including how many eggs a flawless specimen is likely to cost.

How it works

With a Destiny Knot, five of the six IV slots are inherited — each copies a random parent’s value for that stat — and the remaining slot rolls randomly. For each stat the chance of a perfect value combines both cases:

P(slot is inherited)   = inheritedSlots / 6
P(perfect if inherited) = (perfect parents for that stat) / 2
P(perfect if random)    = 1 / 32
P(perfect)              = P(inherited)×P(perfect|inherited)
                          + P(random)×(1/32)

The expected number of perfect IVs is the sum across stats, and the chance of all six being perfect is the product. Inverting that product estimates the eggs needed for a flawless 6IV.

Tips and example

The strongest setup gives each parent perfect IVs in different stats so the two together cover all six. With a Destiny Knot and good coverage, eggs commonly average four to five perfect IVs, and a 6IV result becomes a realistic few-dozen to few-hundred-egg project. Overlapping perfect stats waste coverage, so trade or breed parents that complement rather than duplicate each other.