He is a kindly old wizard who is friends with Papa Smurf, who has given his pet dog Puppy (formerly called Homni-One) to the Smurfs as a pet, and who also assists Sir Johan and Peewit in their adventures. In "The Smurfs And The Magic Flute", he has transported the two humans to the outskirts of the Smurf Village by using "hypno-kinesis". In the cartoon show, Homnibus is friends with the bickering sorcerer coupleSelwyn and Tallulah and was invited along with Papa Smurf to attend their 200th wedding anniversary. He has also adopted a young child whom he named Justin to turn him away from a life of crime that he once had to live as a street urchin. In the comic books, he has a young male servant by the name of Oliver who made occasional appearances.
His character in the cartoon show was voiced by Alan Oppenheimer.