From Homestar Runner Wiki
Sticklyman is featured in the 20X6 style short "Under Construction". He is a parody of the stick figure found on the "Under Construction" logo seen on many unfinished web pages. Sticklyman has some martial arts skills (possibly a parody of the Xiao Xiao flash cartoons) and wields his weapon of choice (his shovel) effectively, but is still no match for Stinkoman.
Sticklyman's primary occupation (when not challenging) is shoveling pudding.