From Homestar Runner Wiki
Sir Rondello Shmallow (better known as Mr. Shmallow—the word "marshmallow" with the first "a" taken out) is the Old-Timey version of Marshie. He is the spokesman for Fluffy Puff Air-Puffed Sugar Delights and is creepy enough to give The Homestar Runner nightmares (though he has a poncey Back East accent instead of Marshie's smarmy, fey lilt). "Look lively!" could be considered his catchphrase. His grave is shown in That A Ghost and in Malloween Commercial, posing the idea that the Old-Timey toons actually happened. He has the same walking noise as Homsar and Nibbles, and his hair is used as a wiper for his glasses.