Backstory

Satsujin was a normal sylveon who had a trainer however he was taken by some pokemon hunters that placed him in an underground pokemon fighting ring. He gained his scars from the constant fights, multiple times he was close to death though he manged to pull through every time thanks to those enhansers that those in charge of the ring gave him. Which in turn gave him an increased attack and stamina but also heightened his bloodlust. He had managed to escape the facility though thanks to those enhancers he has been killing pokemon left and right, unable to erase his blood lust nor stop the inexplicable rage he feels.