Professor Funk MickMeester

, better known as Professor F., is a mad, but friendly, gadget-inventing scientist.

The Mansion of Sammy Joe
Professor F. debuted in The Mansion of Sammy Joe as one of the main characters. Sammy enters the mansion and is saved from ghosts by a strange old man wielding a vacuum cleaner. Professor F. reveals that he lives in a house near the mansion, where he researches his favorite subject - ghosts. Sam explains his friend Madi is missing within the house, and the professor decides to help Sam by giving him two of his inventions, the Ghost Catcher and the Ghost Phone.