How to breed Rainbow Slime in Palworld

The earliest pair is Blue Slime + Cave Bat: both parents can be caught by Lv 36.

• Blue Slimewild from Lv 33
• Cave Batwild from Lv 36

1. Catch a male and a female parent: one Blue Slime and one Cave Bat.
2. Build a Breeding Farm at your base and put both Pals on it.
3. Put a Cake in the farm's box. The parents lay an egg in that box.
4. Hatch the Common Egg in an Egg Incubator: it is a Rainbow Slime.

Open Rainbow Slime in the parent finder Shortest path from your Pals

17 parent pairs hatch Rainbow Slime in Palworld 1.0.5. Sorted by the level at which you can catch both parents in the wild, lowest first (how we rank pairs). "Where to catch" gives the lowest wild level and the nearest fast travel point, or the alpha spawn.

Every pair for Rainbow Slime

#	Parent 1	Where to catch	Parent 2	Where to catch	Both by Lv	Note
1	Blue Slime	wild from Lv 33	Cave Bat	wild from Lv 36	36	special recipe
2	Green Slime	wild from Lv 33	Cave Bat	wild from Lv 36	36	special recipe
3	Red Slime	wild from Lv 36	Cave Bat	wild from Lv 36	36	special recipe
4	Blue Slime	wild from Lv 33	Illuminant Bat	wild from Lv 42	42	special recipe
5	Green Slime	wild from Lv 33	Illuminant Bat	wild from Lv 42	42	special recipe
6	Illuminant Slime	wild from Lv 42	Cave Bat	wild from Lv 36	42	special recipe
7	Illuminant Slime	wild from Lv 42	Illuminant Bat	wild from Lv 42	42	special recipe
8	Red Slime	wild from Lv 36	Illuminant Bat	wild from Lv 42	42	special recipe
9	Blue Slime	wild from Lv 33	Rainbow Slime	wild from Lv 42	42	special recipe
10	Green Slime	wild from Lv 33	Rainbow Slime	wild from Lv 42	42	special recipe
11	Illuminant Slime	wild from Lv 42	Rainbow Slime	wild from Lv 42	42	special recipe
12	Purple Slime	wild from Lv 36	Rainbow Slime	wild from Lv 42	42	special recipe
13	Rainbow Slime	wild from Lv 42	Cave Bat	wild from Lv 36	42	special recipe
14	Rainbow Slime	wild from Lv 42	Enchanted Sword	wild from Lv 42	42	special recipe
15	Rainbow Slime	wild from Lv 42	Illuminant Bat	wild from Lv 42	42	special recipe
16	Rainbow Slime	wild from Lv 42	Red Slime	wild from Lv 36	42	special recipe
17	Rainbow Slime	wild from Lv 42	Rainbow Slime	wild from Lv 42	42	same species

Every Rainbow Slime egg is a Common Egg (Neutral element, normal size). The egg type follows the child's first element and rarity, so a Common Egg from a wild nest can hatch any of 23 Pals, including:

• Cattiva
• Cave Bat
• Chikipi
• Cremis
• Direhowl
• Enchanted Sword
• Fenglope
• Galeclaw
• Illuminant Bat
• Illuminant Slime
• Killamari Primo
• Lamball
• Lapure
• Melpaca
• Mozzarina
• Nitewing

Rainbow Slime parents 110 different children. The 20 rarest, with partners (full interactive table on the Rainbow Slime page):

Child	Rank	Breed Rainbow Slime with	Guide
Bushi	1,560	Panthalus	How to breed Bushi
Felbat	1,570	Aegidron, Bastigor, Blazamut Ryu, Dandilord +5 more	How to breed Felbat
Vanwyrm	1,650	Bellanoir Libero, Eidrolon Ignis, Frostallion, Jormuntide Ignis +5 more	How to breed Vanwyrm
Polapup	1,660	Knocklem Ignis, Lyleen Noct	How to breed Polapup
Kitsun	1,670	Lyleen, Ophydia	How to breed Kitsun
Lapiron	1,680	Dualith Noct, Knocklem	How to breed Lapiron
Beakon	1,690	Celesdir Noct, Solenne	How to breed Beakon
Carnibora	1,700	Eidrolon, Renjishi	How to breed Carnibora
Tarantriss	1,730	Selyne, Whalaska Ignis	How to breed Tarantriss
Slowatt	1,750	Flaracle, Moldron Cryst, Xenolord	How to breed Slowatt
Smokie	1,760	Azurmane, Blazamut	How to breed Smokie
Hoodle	1,770	Elgrove Cryst, Starryon Primo	How to breed Hoodle
Snock	1,780	Faleris Aqua, Pierdon Cryst	How to breed Snock
Elizabee	1,790	Anubis, Astegon, Cryolinx Terra	How to breed Elizabee
Sibelyx	1,810	Dualith, Dupin, Faleris, Roujay	How to breed Sibelyx
Azurobe	1,830	Beakon Cryst, Bellanoir, Celesdir, Jormuntide +5 more	How to breed Azurobe
Valentail	1,900	Menasting Terra, Sibelyx Primo, Warsect Terra, Whalaska	How to breed Valentail
Rayhound	1,920	Ghangler Ignis, Gildane, Suzaku Aqua	How to breed Rayhound
Reindrix	1,930	Moldron, Mycora, Relaxaurus Lux, Splatterina	How to breed Reindrix
Fenglope	1,960	Kitsun Noct, Lapure, Petallia Ignis, Tetroise	How to breed Fenglope

No gender rule applies here: any male and female of the parent species work, in either order. The cake does not change the species. It changes the eggs: a Vegetable Cake lays 2 eggs per breeding, an Extravagant Vegetable Cake raises the mutation chance from 1% to 3%, and a Special Cake makes inheriting several passives (up to 4) much more likely. See the mutation calculator and the passive odds tool.