Duck Avenger

thumb|right|Paperinik logo Paperinik (), also known as PK (Italy, ), Superduck (UK and Digicomics) or Duck Avenger (US), is a comic book-costumed vigilante and Donald Duck's alter ego. The character was created in Italy by Elisa Penna, Guido Martina and Giovan Battista Carpi, and first appeared in the Italian comic series Topolino #706 (June 1969). The character appears in specific Paperinik stories, and he is never mentioned in the main Duckburg continuity.

In the comics, Donald originally created Paperinik as a dark avenger alter-identity to secretly seek revenge upon relatives, before he soon found himself fighting other menaces as a vigilante. He subsequently appeared in many stories on other Disney publications, some of which were dedicated to the character. On 1996, he became the protagonist of the ongoing PK saga , started with the series PK – Paperinik New Adventures (PKNA; known in the United States as Duck Avenger), in which Paperinik becomes a superhero facing villains and more dangerous enemies, especially the Evronians alien race. The PK comics were translated in multiple languages and were adapted in other media, most notably video games.