Complete Monster/Ginga Densetsu Weed


 * If Hougen from Ginga Densetsu Weed is not the most evil and malicious dog ever, in any media, he is surely a strong contender for the place. He introduces himself to the legendary heroes of Ohu by taking a shit and telling them that if they eat it, he'll let them go. He then paralyzes the heroes by threatening to kill a young female, Reika, if they dare to fight back. He has the heroes beaten almost to death as a result. Hougen frequently laughs at pain and desperate acts of heroism and defiles the corpses of those he's defeated (in one snowy scene, he sits on a recently dead dog to keep warm and jeers at the fallen's companion that he'll sit on him next when he dies). Hougen is not above using his lackeys as expendable shields (sending dozens of them to their deaths against opponents whom he can beat himself, and so on), and when he has temper tantrums, he brutally kills whoever happens to be standing around. Even finding out that Hougen and his brother were trapped by their human owner for so long that they had to resort to cannibalizing the dogs trapped with them does nothing to evoke sympathy for his cruelty. The only smidgen of honor Hougen shows throughout the whole series involves a pact he and his brother made, that if Genba dies, he wanted it to be by Hougen's fangs. When Genba suffers a head wound that drives him psychotic, Hougen murders him. Then promptly turns on the dogs who were with his brother, tears out their throats, and hurls them from the top of Gajou.
 * Hougen is also a serial rapist, who demands his underlings to round up females for him. He forced Nero (then-pack leader of one of the main characters, Lovable Coward GB, and a minor villain) to kill the abandoned puppies right in front of GB (GB was about to look after them but brought them at the wrong time) just to prove that the puppies weren't Nero's - and that Nero, therefore, did not hide a female from him. This, by the way, did not save Nero's hide in the end, as later (chronologically), after Nero encountered the leaders of Ohu, was swiftly cowed into submission by them and tried to justify his cowardice to Hougen by saying that they threatened to bite off his legs and piss on his face. Hougen immediately made an example out of him by doing exactly that