Day 8 of the Tamer-sona weekend: Alternatively (Part 1)
"Has your partnermon ever had any bad evolutions? Do they have any special evolutions? (Armor, Jogress/DNA, Burst Mode, Matrix, X-Evolution, etc.)"
Naomi and Zack's Beelzemon has many forms and goes by many names. His rarest form being his Baphomet Mode, known only as Baphomon.
Baphomet mode is a form of Digivolution known only to a Demon Lord and its appearance varies between each of them. This Digivolution is a form of Biomerging with their tamers and is considered neither good nor bad. Its power and knowledge of the universe are limitless, though only for a short period of time.
More info on Baphomon: https://www.furaffinity.net/view/36509290/
Baphomon, Artwork © NoireNotorious/NotoriousNoire