What sources list villain intelligence in comic books?

The single verified source is the Wikipedia entry on the term 'villain'. This article defines a villain as a cruelly malicious person who serves as an important evil agency in a plot, contrasting with a hero. It discusses the structural purpose of villains and their motives, but it does not mention or provide any data on villain intelligence within comic books. Therefore, based on the evidence supplied, no source lists villain intelligence in comic books.