Kegenmon

This is the dark digivolution line for Tuftamon and they have a natural  rivalry with the Naramon line. These are the first designs so they may  end up changing but they probably won't.

Pudumon -> Tuftamon -> Kegenmon-> Akamon -> Reikimon

Kegenmon = short for keukegen, a small, fluffy spirit that brings misfortune and disease

Akamon  = short for aka-kuchi/aka-shita, it is a smoke like spirit that drains  the water out of bad farmers fields and grabs them with its long tongue

Reikimon = reiki is the spirit of a demon

Info: Digimon  of this line use fire based attacks. They tend to refer to themselves  as males but they have been known to also be gender neutral and some  identify as females. 

Kegenmon
Beast type
Known as a  trickster and tends to be more of an annoyance than an actual threat.  Kengenmon likes to play “games” with others but sometimes they get out  of hand…
Horned blows: Kegenmon attacks by head butting.
Dirt bath: Kegenmon shakes itself like a dog and a black, sticky substance flies in all directions. This acts as a sort of glue.
Grave fire: a blue flame appears and homes in on its target, it has a hit rate of 70%.
Marked gavel: the stone markers that Kegenmon carries are used like a hammer to smash the target into the ground.

Akamon
Ghost type
Capable of flight
Known  as an evil digimon, it attacks those who enter its territory with  intense anger. Its body is made of a smoke-like matter that grave  markers protrude from it. Slips of paper are also expelled from its  body.
Fearsome fire: A stream of flame is released from Akamons mouth.
Expel evil:  Paper talismans bearing the symbols for evil are forced from Akamons  body and used to attack its opponent. These talismans attach to the  target and wrap around them, building up until the target cannot move.
Rushing smoke: Akamon charges and attacks with its horns.
Raking claws: it attacks with its claws, often in a downward vertical movement.
Red coffin: Akamon attacks with its teeth, if able it will try to eat the target.

Reikimon
Evil type
This  digimon is either inclined to dangerous pranks or is outright evil. It  has no sympathy for others and has an intense hatred for humans.
Ogre’s wrath:  Reikimon puts all its strength into its fists or feet. A fist can  easily shatter the ground and when put into its feet it can jump so high  it seems like its flying.
Ghosts of the flame: a more powerful form of grave fire, many flaming orbs are summoned that home in on the opponent.
Oni thrash: Reikimon attacks with its powerful tail, it can wrap the tail around another and use it to crush them.
Destructive aura: it exudes a powerful aura capable of heightening the aggression of other digimon.
Talon bullets:  Akamon points out with its fingers and then attacks the target with it,  however the power behind it is so great that it pierces skin like a  bullet.

MEGA - Work in progress