Isenberg and Skir wrote together on scores of animated series, including Beetlejuice, The Legends of Treasure Island, and particularly a long list of superhero or action shows: X-Men, Batman: The Animated Series, Superman, Spider-Man, Gargoyles, The Mask, Ultraforce, and Extreme Ghostbusters. The team were story editors as well as writers on Godzilla: The Series, Beast Machines, and Action Man.
After 2003, Isenberg mostly wrote solo, working on Danny Phantom, the 4Kids produced Teenage Mutant Ninja Turtles, and various Ben 10 and Transformers productions. He wrote and received supervising producer credit on the animated Guardians of the Galaxy series.
- Dog City