Oscar the Shark Slayer

Oscar the Shark Slayer is the secondary antagonist of the Mother Series. he was the leader of the 1996 shark genocide before Fawful casted a spell on him to serve under his rule. He's kind of a murderer, but it's complicated. He orchestrated the murders of twelve pakistani children in the 80s, which become a major plot point in EarthBound 12.
He is also a raging homosexual.
He met his demise at the hands of Samantha when she was forced to choose between him and the EarthBound Species.