Argus McSwine is an enemy of Scrooge McDuck and Donald Duck. He appears in many stories, both by Carl Barks and others. Sometimes he has the Beagle Boys working for him. His first appearance was in Forbidden Valley, Donald Duck #54.
McSwine has appeared in many Egmont-produced Disney stories in which he antagonizes Donald more than he does Scrooge. Argus is a lot like Neighbor Jones in this function—except that he does not live next door to Donald, and is often a crook or con man (whereas Jones is generally on the side of law and order). Often portrayed as rich, McSwine sometimes competes with Scrooge for some type of prize in much the way that Flintheart Glomgold or John D. Rockerduck also do.
Argus is in fact one of the most evil villains in the Scrooge stories, having openly shot at the ducks and threatened them with harm in a manner that the Beagle Boys rarely do.
From the 1950s to the 1980s, McSwine had no consistent name and was known only as "the pig villain", going by a number of one-time aliases including John the Con and Porkman De Lardo.
The last name McSwine comes from Carl Barks' Donald the Milkman. In 1990, then-editor Bob Foster published that story for the first time in the USA. At the same time, the decision was taken that McSwine should be the character's "real" name, with the first name Argus being added at the same time. Thus the pig villain has remained Argus McSwine in many other stories through 2010, with only the occasional alias used in more modern times (Lardo J. Porkington in Lars Jensen's The Nest Egg).