Heronicus is a character in The Flip Flop Show who lives in Flipside in the houses behind Saffron's restaurant. He is a retired explorer who "knows much about other lands", with certain smells bringing back memories. After each chapter a different smell brings back a memory of the world Bleu has just visited.
It is mentioned in Flopside that he had a partner who lived in the house parallel to Heronicus', whose "game ended tragically". The treasure maps that they collected can be bought from Flamm in the underground of Flopside.
Heronicus also appears briefly at the beginning of Chapter 6, fleeing from the Sammer Guys.
- On a shelf in Heronicus' home, there is the vase from Chapter 2-3, a MeowMaid-like relic, and a model of the two stone heads found in Chapter 4-2; atop his bookshelf, a dark rock from Outer Space, a totem pole from Downtown of Crag and a torch holder from The Underwhere can also be found. Heronicus additionally has a picture that may possibly depict a blue Squarp Hole, and Flipping in his home reveals another picture of a sandy, dune-filled expanse resembling Yold Desert (Curiously, this picture actually shows the background Yold Desert possessed in the beta version of The Flip Flop Show).
- Heronicus has high scores in the Flipside Arcade of 550000 and 80000 in Mansion Patrol, and 1000000 in Hammer Whacker.