Breeding System: Egg Groups, Pairing Rules and Tips

Breeding Basics

1. You need one male and one female spirit.
2. Both parents must share at least one egg group.
3. The offspring is always the same species as the mother.
4. Hatching takes anywhere from 30 minutes to 20 hours.

What Are Egg Groups?

Egg groups are a hidden classification — spirits in the same egg group can breed together. Roco Kingdom: World has 14 egg groups:

Fairy, Animal, Sky, Humanoid, Giant, Reptile, Sea, Bug, Plant, Stone, Spirit, Cute, Dragon, Mechanical.

Some spirits belong to two egg groups, which gives them much wider pairing options.

Shiny / Variant Eggs

• Normal pairings have a small chance of producing a shiny or variant offspring.
• If both parents are shiny / variant, the chance is much higher.
• Shiny / variant eggs have a special icon — you'll spot them at a glance.

Shiny and variant spirits are cosmetic differences only — stats are identical to normal forms.

Practical Breeding Tips

1. Use our Egg Groups tool to find compatible partners.
2. If a pair doesn't produce after 20 hours, withdraw and re-pair.
3. To target a specific species, set that species as the mother.
4. One male + multiple females = multiple eggs at once.

The pairing simulator on /egg-groups confirms compatibility before you commit.