Weasel

Jack Hammer, known as Weasel, is a genius-level hacker, inventor, and arms dealer who became Deadpool's closest (if long-suffering) friend. Possessing no superhuman abilities, he relies on his formidable technical intellect to build gadgets and supply weapons, serving as both sidekick and information broker within mercenary circles.

Few characters capture the scrappy, irreverent spirit of Marvel's Copper Age quite like Weasel, who burst onto the scene in 1993's Deadpool: The Circle Chase #1 — the very miniseries that helped launch one of comics' most beloved anti-heroes into the spotlight. Created by Fabian Nicieza and a young Joe Madureira, Weasel has proven himself a genuinely enduring presence across more than three decades of Marvel storytelling, racking up 62 catalog appearances and two collector-significant key issues along the way. His adventures unfold most richly across Cable & Deadpool and the various Deadpool titles, where he shares pages with a remarkable roster including Wolverine, Domino, Nathan Summers, and Blind Al — the kind of chaotic, colorful company that defines Marvel's modern era at its most fun. If you love the wilder, weirder corners of the Marvel Universe, Weasel is absolutely worth tracking down.