Croc

Waylon Jones was born with a rare genetic disorder that gave him thick, scaly reptilian skin and exceptional physical strength. Raised in hardship, he turned to crime in Gotham City, where his fearsome appearance and brutal power made him a dangerous recurring threat to Batman.

Few characters make their debut in a reference work and still manage to carve out a lasting corner of the DC Universe, but here we are — Croc, introduced by Len Wein in Who's Who: The Definitive Directory of the DC Universe #5 in 1985, a Bronze Age entry that planted a flag for decades to come. With a catalog presence stretching all the way to 2026 and appearances alongside the likes of Batman, Robin, Bruce Wayne, and Alfred Pennyworth, this is a character woven into the fabric of Gotham's world. Showing up across titles like Absolute Batman and The Batman Strikes, Croc has proven quietly enduring — a collector's footnote that refuses to stay in the footnotes, including at least one key-issue appearance worth tracking down.