Voir Professor Balthazar, Season 3 - Episode 6

Rudi the retired scientist believed that there was a monster in the town lake like the one in Lochness. He believed in this but had no proof. Professor Balthazar found a way of luring the monster onto the Surface of the lake and from then on the monster Fu-Fu, Rudi and Professor Balthazar became very good friends, attracting the attention of the other citizens of Balthazar Town through their tricks.