Breakdramon/Brakedramon
Smash
Pass
seen from Saudi Arabia
seen from France
seen from Malaysia

seen from United States

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seen from Sweden

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seen from Argentina
Breakdramon/Brakedramon
Smash
Pass
Slayerdramon + Breakdramon = Examon
behold my brakedramon oc
Breakdramon BT20-044
Breakdramon EX3-044 Alternative Art
Breakdramon EX3-044
It is so hard to look for a level 6 (Ultimate/Mega(English)) virus mechanical Dinosaur/Dragon that doesn't have, "Its personality is eroded by the evolution, and it operates solely on destructive instinct/external directive" in its lore.
(Greymon family not included, because they have the plot armour and not entirely mechanical.)
I suppose the earliest (1999), and the most famous of this archetype is Mugendramon, aptly localized as Machinedramon. (Level 6 was created specifically for the original 1999 anime and become the franchise standard as time goes on.)
...it possesses an intellect which boasts incomparable throughput, but it is a purely mechanical Digimon which does not share their self-will. Instead, someone planted a program containing evil intentions within the Digicore...
My personal favourite is Breakdramon (2007), who evolved from wild, yet conscious Groundramon. It is quite tragic as it is a path in Dracomon split evolution, its counterpart, Slayerdramon, is the power acquired by trails and tribulations, overcoming the trails of 4 heavenly dragons.
...through hacking, in obtaining the design data for various construction equipment... ...in exchange for excellent mechanical performance, its organic parts were reduced almost to 0, and its motives and emotions were lost...
The more insane one is Darkdramon (2005). In order to talk about it, I need to tell you about The totally-not-corrupted Digimon military force; D-Brigade. This Digimon might be a result of D-Brigade performing a horrific experiment on one of its critically injured elite soldier. (D-Brigade has no transparency) It seems to lose its personality and now hell-bent to accomplishing its last directive or motivated by only vengeance, no matter what stands in its way, friend or foe.
...after its evolution, it ran wild and broke out, so currently even the D-Brigade cannot secure Darkdramon's whereabouts. It is said that even now it is hunting "Codename: BAN-TYO"...
After Darkdramon went on a rampage, D-Brigade finally created the perfect, controllable ultimate weapon. It is literally called Brigadramon (2023) and is the face of its PR. It possesses advance intelligence and is able to perform complex mission controls, but if it has free will is up to debate, as this is not a natural evolution. There are only 3 Brigadramon in The Digital World, all created and "employed" by D-Brigade.
...After reflecting upon their failure to produce the strongest and most unique Digimon to represent their organization, they evolved and developed a Digimon as a command aircraft for managing troops efficiently...
There are certainly a lot of lose of self for Ultimate Virus, even for more-organic ones such as Boltboutamon or Megidramon, while many fully robotic Data/Vaccine monster would have sense of self and emotions.
Breakdramon BT1-026