Dark Evolution

Dark Evolution (暗黒進化 Ankoku Shinka, ダーク進化 Dku Shinka) is a corrupt form of normal evolution. =Appearances=

Digimon Tamers
In Digimon Tamers, Takato, enraged by the death of Leomon by Beelzebumon, Megalo Growlmon became Megidramon, whose uncontrollable form almost destroyed the entire Digital World, from the power unleashed by the Digital Hazard symbol on its chest, concurrently having an effect on the Real World.

Digimon Savers
In Digimon Savers, enraged by Thoma's sudden betrayal caused a dark aura to emit from Masaru's body, influencing the transformation of Shine Greymon to Shine Greymon Ruin Mode.