Mortadelo y Filemón are very famous in Spain, there are even two movies besides the 5 Alcachofa adventures
-El Sulfato Atómico
-La Máquina Meteoroloca
-La sexta secta (divided in El Escarabajo de Cleopatra + Operación Moscú)
-La banda de Corvino (divided in Balones y Patadones + Mamelucos a la Romana)
-Una aventura de cine (previously published as Dos Vaqueros Chapuceros + Terror, Espanto y Pavor)
I think the first 4 are only available in Spanish
This is a bit difficult but you're all such experts