In 1961 he and Andrea Corno founded Editoriale Corno. Bunker's first creation was Maschera Nera, a masked vigilante in the Wild West. This character was heavily inspired by masked Western heroes like Zorro or The Lone Ranger. Later he and Magnus bond together. This duo became one of the most important comic artists of Italy (simply known as Magnus & Bunker). In 1964 a sub-genre called "Fumetti Neri" (black comics ) arised. Fumetti Neri are comics, where the antagonists are anti-heroes or criminals. Magnus & Bunker contributed to this sub-genre with their first creations Kriminal and Satanik. In 1968 they created Maxmagnus. But their most popular work is Alan Ford, a humorous spy-fy comic which was released by Bunker's own publishing, Max Bunker Press. As from 1970 Max Bunker published and distributed diverse Marvel titles in Italy.
Other creations of Bunker are El Gringo, Fouché, Capitan Audax, Dennis Cobb, Kerry Kross, Xibor, Zorak, Lurid Scorpion, Max Reporter and many others.