Meanwhile, "Underdog" is on MeTVToons, where his secret weapon is--well, let him state it:  "The secret compartment of my ring I fill / With an Underdog Super Energy Pill."
Meanwhile, while "Underdog" went from General Mills to Golden Books to Lorne Michaels (yep) to NBCU's DreamWorks Animation, "Roger Ramjet" went from small production companies to---ooh, its DVD release was on Classic Media, which means that DreamWorks may own it, since it bought out Classic Media to get the TTV characters (and the Jay Ward characters, although the Ward estate also partially owns them).