Deadpool is a character appearing in American comic books published by Marvel Comics. Created by Fabian Nicieza and Rob Liefeld, the character first appeared in New Mutants #98 (December 1990). In his comic book appearances, Deadpool is initially depicted as a supervillain of the New Mutants and X-Force, though later stories would portray him as an antihero. Deadpool is the alter ego of Wade Wilson, a disfigured Canadian mercenary with superhuman regenerative healing abilities. He is known for his tendency to joke incessantly and break the fourth wall for humorous effect.
The character's popularity has seen him featured in numerous forms of other media. In the 2004 series Cable & Deadpool, he refers to his own scarred appearance as "Ryan Renolds [sic] crossed with a Shar-Pei". Reynolds himself would eventually portray the character in the X-Men film series, appearing in X-Men Origins: Wolverine (2009), Deadpool (2016), and its sequel Deadpool 2 (2018). Reynolds attributes Cable & Deadpool #2 to what got him invested in the character and inspired him to bring the character to the movies. He will continue playing the character in Deadpool 3 (2024), set in the Marvel Cinematic Universe.
Created by artist/writer Rob Liefeld and writer Fabian Nicieza, Deadpool made his first appearance in the pages of The New Mutants #98 cover dated Feb. 1991. According to Nicieza, Liefeld came up with the character's visual design and name, and Nicieza himself came up with the character's speech mannerisms.
Liefeld's favorite comic title before X-Men was Avengers, which featured weapons like Captain America's shield, Thor's hammer and Hawkeye's bow and arrow. Because of this, he decided to give weapons to his new characters as well. Liefeld, also a fan of the Teen Titans comics, showed his new character to then-writer Fabian Nicieza. Upon seeing the costume and noting his characteristics (killer with super agility), Nicieza contacted Liefeld, saying "this is Deathstroke from Teen Titans".