Wechidna or Parasitic Echidna

Lack of Morality (Amorality):
Wechidna does not act out of malice or cruelty. From a human perspective, its actions are monstrous, but biologically it is merely an apex predator acting on pure instinct. It feels no guilt, remorse, empathy, or fear of death because it is simply a parasite driven by the instinct to dominate everything.

Instinct to infect: it attacks any living being that comes its way (especially Mobians) with ferocity and savagery.

Mission to spread: He takes this mission of spreading the infection seriously, so seriously that he thinks of nothing but killing and infecting others who come his way like a virus.

Completely mute: totally incapable of speaking, both physically and telepathically.

Size Change: It can alter its physical stature, potentially reaching up to 3 meters in height.
Infectious fluid: It can release a black liquid from its neck that, upon contact with a corpse or other living being, will infect it. The infected person's body will become deformed with numerous yellow eyes and small blisters that burst open releasing the same liquid.
Agility and Flexibility: Wechidna is quite agile and flexible, able to dodge projectiles fired at the speed of sound, execute quick strikes, and contort its own body to extreme levels.
Tactical and instinctive intelligence: does not build tools or speak, but demonstrates a high capacity for problem-solving, learning by observation, and adaptation to the terrain.
Hive mind: can manipulate the minds of other infected individuals to achieve its own goals.

Wechidna resembles Knuckles, but with some differences: his fur is now brown instead of red, he has a scar on his right eye, and his eyes are made of black ink. His outfit is also different: his gloves are yellow instead of white and don't have spikes, his shoes are red with yellow stripes and lack the brick on the upper part. His crescent moon is also inverted. He has also been revealed to have monstrous teeth under his neck and a strange ink tattoo on his dreadlocks and neck (on his neck, part of his true form is exposed).

In its true form, Wechidna becomes a tall, eyeless creature, its eyes replaced by a cage of molten flesh that reveals a single eye. It retains its dark red fur, yellow gloves (though stretched and long), and shoes, all fused to its body. It displays various wounds as a result of its transformation, such as open sores on its abdomen, arms, and legs. Its monstrous teeth are also larger and more visible.

It is 1.00 m tall.