Years ago, DyTyllio was saved by Jeremy from being run over by a car. When Jeremy and Cindy broke up, DyTyllio stayed with Jeremy in order to help him cope with the loss over Cindy. Years later, he accompanied Jeremy to a shrine located in a mountainous region. Jeremy made a pact with a Dark Entity that would help destroy the world. Although DyTyllio knew Jeremy was wrong, he remained silent and played along.
DyTyllio and Jeremy returned to New York and perched themselves atop the Karstick Building. DyTyllio accidentally said something that he shouldn't, causing Jeremy to be angry with and grabbing him by the throat. He was later seen being confronted by both the Ghostbusters and Cindy. She tried her best to reason with Jeremy but found out he was beyond reasoning.
During the chaos, a powerful wind gust almost knocked Cindy off the building. DyTyllio saved her only to be knocked off himself. Hanging on for dear life. Jeremy rusheed to his aid, calling him a fool. This prompted DyTyllio to give Jeremy a truthful speech that destroying the world would not help cure his loneliness and anger and that he wanted nothing to do with him. In a change of heart, Jeremy decided to stop Ragnarok from happening. DyTyllio was pulled back up and remained with Cindy and Jeremy after the Ghostbusters defeated the Dark Entity.
- DyTyllio was named after The Real Ghostbusters writer Larry DiTillio.
- On page five of Ghostbusters Issue #5, DyTyllio makes a non-canon cameo at Fantastic Land.
- On page one of Ghostbusters Issue #7, DyTyllio makes a non-canon cameo as one of the hostages of the Hungry Manitou.
- Marsha Goodman (1986). Episode Call Sheet and SAG Report - "Ragnarok and Roll" (1986).
- Jeremy (2009). The Real Ghostbusters- Ragnarok and Roll (1987) (DVD ts. 1:52-1:54). Time Life Entertainment. Jeremy says: "Yes, DyTyllio. This is the place."
- Eatock, James & Mangels, Andy (2008). The Real Ghostbusters Complete Collection booklet, p. 12. CPT Holdings, Inc.