He is a gothic student that studies the origins of the paranormals and the werewolves how the wolf bites a human being by giving a curse due to the full moon.
He serves as the mentor and friend of Tommy Dawkins, he then teaches him how to become a good werewolf.
Merton first debuts in the season 1 episode 1, he was studying the origins of supernatural creatures could be really happened.
He loves to play with his pet snake, he caught Tommy where he mistakes him for a monster.
Tommy explains to Merton that he was bitten by a wolf that turns him into a werewolf, then Merton frees Tommy and decides to teach him how to become a good werewolf. In one of the episodes of the season 1, he helped his friend Tommy how to catch a intruder by scaring it.
Merton Dingle is also a friend of Lori and Tommy, he is also a master of disguise, he can also disguise as a gothic woman, he disguises himself as a Japanese guy where he learns Japanese language where he learns this language from Japan.
He was petrified to death by a Medusa, he was revived by Tommy with an antidote.(with the help from Lori who manages to defeat the Cyclop who was a giant monster with one eye).