Combo bases are special bases that can appear when breeding two parents with specific bases to each other. The parents are ‘factors’ and breeding two factors on different sides can result in a combo base! Breeding factors together does not guarantee a combo-base offspring, combo bases are rare and have a low chance to appear when breeding factors together.
For example, the combo base Inferno can be produced by breeding its ‘Factor A’ base Charcoal to ‘Factor B’ base Ember. In other words, a Charcoal base vulpix bred to a Ember base vulpix can result in Inferno.
You can also breed a combo base to itself and possibly produce that same combo base! You can also breed a combo base to any of its factors on either side to have a chance of producing that same combo base!
For example, you can breed Inferno to either Charcoal or Ember to have the same chance of producing Inferno! That being said you cannot produce Inferno vulpix if you pair an Inferno with any other base other than Inferno, Charcoal and Ember.
Whether you pair Factor A x Factor B, Combo x Factor A/B or Combo x Combo all have the same chances to produce combo-base vulpix. There is no increase in chance for pairing a Combo x Combo, the chances are all still the same!
Inferno
Charcoal x Ember
Nebula
Celeste x Nocturne
Latte
Coffee x Flurry
Leonid
Celeste x Sunset
Honey
Blonde x Honeycomb
Fog
Flint x Haze
Champagne
Peach x Wine
Mist
Dawn x Cloudy
Mocha
Chocolate x Coffee
Seabed
Seaside x Seagrass