What is the first thing Melvin does when he becomes Toxie in the first film? Beat the crap out of a gang of drug dealers who were brutalizing a cop (killing most in the process while one got away with a Groin Attack), cleans up and helps the officer, getting him back on his feet and handing him his equipment back, and he apologizes to the cop for the violence and runs off. This gives the cop the message that the monster is a hero. Later on he says of Toxie, "If it wasn't for the monster, I would've died that night" and the same cop is one of the citizens who turned on the Corrupt Mayor when he wanted Toxie dead.
In the sequel the first thing Toxie did when he was in Japan was to prevent Masami from being gang raped and she became his friend since then.
Also the sequel when Toxie is reunited with his real father Big Mac Junko (Not the film's antagonist Big Mac Bunko, Toxie made that mistake) turns out despite hiding from the authorities who thinks he's Big Mac Bunko, he's aware of what his son became and proudly says he's so proud of him.