In 1973, cartoonist Juan López Fernández "Jan" was commissioned to produce a book of very short comic strips parodying Superman.

Antonio Martín, then editorial director of the comic book area of the Barcelona publisher Euredit and responsible for the commission, had to convince Jan -who did not consider himself a comedian- [2] to do the job, and he did it quickly, without much faith.

The work was included in the collection Humor siglo XX, dedicated to the satire of characters from comic books, literature and American cinema, such as King Kong, Tarzan or Frankenstein.

Jan conceived his parody of Superman in the manner of an ordinary Spaniard, "in the key of a tacky marriage" because it seemed to him to be the closest thing to the public at the time.

The jokes corresponding to this volume, traced with Rotring lines on sheets of folio paper and with an extension of up to four vignettes, have a simple and expressive line drawing, and present -despite the limitations of the format and the fact that they maintain little connection or continuity between them- effect gags on Superman, rather "domestic" mute jokes,[4] which have little to do with the character later developed in the Superlópez comics of Ediciones B. Recurring villains include the evil professor Escariano Avieso; Lady Araña (“Lady Spider”); the gangster Al Trapone (a reference to Al Capone; he is accompanied by goons like Carasucia, Caracortada, Carapincho, gun-wielding Pistolet, etc.

In book 69, the Supergrupo meet Los Ligiones Justicieros, DC's JLA, featuring parodies of Superman, Batman, Wonder Woman, Green Lantern and Aquaman.

Original writer Efepé (pseudonym of Francisco Pérez Navarro) left the character after the early issues and, from that point on, artist Jan took over the writing as well.

Famous buildings and monuments in Barcelona are often portrayed in detail, as well as those in other cities of Catalonia (Camprodon), Europe (Andorra, Grenoble, Bulgaria) or Japan.

In El virus Frankenstein (56) a virus changes a young boy into a horrible monster while the El mundo de al lado (57) features a door to another dimension where maybe based on a Little Prince story, the people are enslaved into pulling huge wagons around the planet and Elecciones en Kaxim (58) feature him interfering in elections on a strange alien world.

[6] There is a 2003 short animation film named Superlópez contra el robot de bolsillo by Enrique Gato, the creator of Tadeo Jones.