By 1993, Marsh was working as a writer and director on Nickelodeon's animated series "Rocko's Modern Life"— the channel's first "in house" cartoon production— for four seasons. He found himself working alongside Povenmire again, this time as a writing partner, a choice Marsh claimed was made by the crew in hopes of making Povenmire's neatness offset his own sloppy storyboarding. The pair developed a distinctive style, including in their stories characteristic musical numbers and chase scenes. Together they won an Environmental Achievement Award for a 1996 "Rocko" episode they had written.