|Type||(Ja:) Dimetrodon Digimon|
|Prior forms||Anyone + B Holy Spirit of Flame|
Infernomon is a Mega-class Beast Hybrid Digimon whose name is derived from the Italian word Inferno, meaning Hell and taken from another word for conflagration, a massive fire, this also signifies her role as the Goddess of Flame. She is the Beast Holy Spirit of Flame, created by King Royalmon as well as Queen Majestymon, the parents of Prince Signamon.
Infernomon is Blazemon's Beast form, which she undertakes when she slide evolves using the B Holy Spirit of Flame. She is Blazemon's raw power form. Infernomon is Blazemon's main battle form, when she needs to deal immense damage. She now takes the form that greatly resembles that of a Dimetrodon. Infernomon is noticeably beastly than her Blazemon appearance, and Blazemon allows her true personality to bleed through in this form, she is most vain and sadistic in this form. Infernomon was the third of the Elemental Gods to obtain her Beast Spirit while in the Dark Area. The Crest of Courage and the other with the symbol representing the Spirits of Flame are now imprinted on her body. Like most wielders, she is unable to completely control her Spirit at first use, though she trains herself, Infernomon is unable to completely use her form in the next battle but grows to master it.
- Fire Oath – She slams her front paws on the ground, causing pillars of fire to rush towards her opponent. When the pillars reach the opponent, they form a ring of pillars and then merge into one giant fire pillar, damaging the opponent.
- Tail Attack – She can attack her opponents using her powerful tail.
- Flame Shower Breath - She inhales a huge amount of air and strongly exhales it, creating a huge gust of wind similar to a hurricane that can level a city.
- Flame Bomb - Infernomon's whole body glows pale red. Her body then becomes surrounded in a teardrop-shape red flame. She also surrounds her body in a round yellow fire. Infernomon then fires the flame from her body at the opponent, and it shoots at the opponent like a spinning meteor.
- Fire Fang - Infernomon opens her mouth and its becomes surrounded in flames. She then bites down and the fire surrounds her bottom jaw and teeth. Infernomon then bites down on the opponent.
- Cross Flame - Infernomon fires a large sphere of flames with two rings surrounding it from her mouth at the opponent. When the sphere hits, it creates a violent explosion.