Large Marvin is the fattest Fraggle in Fraggle Rock, due to his love of snacking. He is a bit dimwitted, but is also athletic and a feared swimming opponent of Red Fraggle. His first appearance was in the Fraggle Rock episode "The Beast of Blue Rock." Large Marvin Fraggle made a non-speaking cameo in A Muppet Family Christmas during the "Pass It On" number. In Muppets Tonight, Large Marvin was later seen as an audience member.