Bimo

He has a spray with a green liquid that gives him life and heals his wounds.

Given his dark nature, black, flowing tendrils with pointed, clawed paws may appear from his back (they are unruly)
A black liquid flows from his eyes, which he can pull and use as a weapon even when attacking, he is able to summon a Yin-Yang ventilation circle and attack with shadows, but also from a cute harmless creature he can become a creepy monster, transforming into something dark with black tentacles sprouting from his mouth and wanting to absorb inside
It can also change depending on emotions, becoming a rabbit, a mouse, and other animals, or a huge wolf that can't control itself (it all depends on the intensity of the emotions)

He is the very last of the experiments, which was intended for tedious, painstaking work with documents, bills, complex logical problems (that is, things that scientists don’t want to mess around with)
Scientists did not treat him very well because they saw that he did not obey the system in which he was programmed (there was no interest in the scientific field and resistance to tests and experiments).
Bimo was created to be an impenetrable creature. He can be hit as much as you want with anything, but he still works... In fact, his chip 1001 was swapped with his brother Ayla's chip 1000, and that's why he's emotional...
The experiments of Aylu and Bimo themselves have ghostly shells (Aylu's is cheerful orange, while Bimo's is old and exhausted, without a green glow because they did not fill it with green healing liquid in the dome)
The Yin-Yang Amulet is a consequence of Bimo's contract with the dark entity and the condition that the victim cannot use emotions, that is, with strong emotions, the dark force goes out of control.
All the experiments were killed by hunters, but Bimo miraculously survived and escaped while the red foxes, including Foxy (Pink), dealt with the hunters.
Foxy was forced to look after Bimbo when he was little and was furious at how he was able to play the duck game perfectly and press through obstacles.
And then he escapes through a black portal and Pink appears, who exterminates the black creatures (he lived there) and Bimo escapes into the portal from Foxtown
And Son came from Bimo's imagination when a pink chemical was poured on him.
The scientists were killed by Andy (their assistant) so that they would not make an obedient machine puppet out of Bimo and he chipped and replaced

a withdrawn and silent ermine with black hair, black metal bracelets with different patterns, an almond-shaped and sticky tail tip, black like his sticky pads, black paws that stick to surfaces, and wears a black and white amulet with a dark essence inside, an alien cat named Darkness, who sometimes escapes