Question: This character appeared in comics published by Marvel, one of his adversaries were Flag-Smasher and was created by Rob Liefeld. Who was the other creatore of this character?

Context paragraphs:
Youngblood (comics): Youngblood is a superhero team that starred in their self-titled comic book, created by writer/artist Rob Liefeld.  The team made its debut as a backup feature in the 1987 one-shot "Megaton Explosion" #1 before later appearing in 1992 in its own ongoing series as the flagship publication for Image Comics.  Youngblood was originally published by Image Comics, and later by Awesome Entertainment.  Upon Rob Liefeld's return to Image Comics, it was revived in 2008 and again in 2012.

Deadpool: Deadpool (Wade Winston Wilson) is a fictional antihero appearing in American comic books published by Marvel Comics.  Created by artist/writer Rob Liefeld and writer Fabian Nicieza, the character first appeared in "The New Mutants" #98 (cover-dated February 1991).  Initially Deadpool was depicted as a supervillain when he made his first appearance in "The New Mutants" and later in issues of "X-Force", but later evolved into his more recognizable antiheroic persona.  Deadpool, whose real name is Wade Wilson, is a disfigured and mentally unstable mercenary with the superhuman ability of an accelerated healing factor and physical prowess.  The character is known as the "Merc with a Mouth" because of his talkative nature and tendency to break the fourth wall, which is used by writers for humorous effect and running gags.

Flag-Smasher: The Flag-Smasher is the name used by two fictional supervillains appearing in American comic books published by Marvel Comics.  The original was most often a foe of Captain America while other adversaries of the Flag-Smasher include The Punisher, Moon Knight, Ghost Rider, The Runaways, The Liberteens and Deadpool.

Fighting American: Fighting American is the title character of a patriotically themed comic book character created in 1954 by the writer-artist team of Joe Simon and Jack Kirby.  Published by the Crestwood Publications imprint Prize Comics, it was, contrary to standard industry practices of the time, creator-owned.  Harvey Comics published one additional issue in 1966.  One final inventoried tale was published in 1989, in a Marvel Comics hardcover collection of all the Fighting American stories.  Subsequent publishers have had short runs of Fighting American stories with the permission of the owners' estates.  The character gained some notoriety due to a lawsuit in the late 1990s when Awesome Entertainment founder Rob Liefeld announced intentions to publish a mini-series that was allegedly similar to that artist's run on Marvel's Captain America title.  After settling the dispute, Awesome released three Fighting American series.

Judgment Day (Awesome Comics): Judgment Day was a limited series published by Awesome Comics from June to October 1997 written by Alan Moore and illustrated by Rob Liefeld, with additional art by Gil Kane.  This story delved into the Awesome Comics universe of characters created by Liefeld, including "Supreme", "Youngblood" and "Glory", and deals with the concept of superheroes being tried for murder.  It also features characters created by other Image Comics creators such as Erik Larsen's Savage Dragon.

Cable (comics): Cable (Nathan Summers) is a fictional character appearing in American comic books published by Marvel Comics, commonly in association with X-Force and the X-Men.  The character first appeared as a newborn infant in "Uncanny X-Men" #201 (Jan. 1986) created by writer Chris Claremont, while Cable's adult identity was created by writer Louise Simonson and artist/co-writer Rob Liefeld and first appeared in "The New Mutants" #87 (March 1990).

Glory (comics): Glory is a fictional comic book superheroine created by Rob Liefeld.  She first appeared in "Youngblood Strikefile" (vol.  1) #1 (1993), and initially starred in books published by Liefeld's Extreme Studios, which was a partner studio of Image Comics, a publisher that Liefeld co-founded in 1992.  Following Liefeld's departure from that publisher, the character went on to appear in books published by Liefeld's subsequent endeavor, Awesome Comics.  An homage to Wonder Woman, Gloriana Demeter is a half-Amazonian, half-Demon warrior.

Bloodwulf: Bloodwulf was an American superhero comics title and character created by Rob Liefeld.  The character first appeared in the one-shot "Darker Image" in 1993, published by Image Comics.  The character later appeared in a Bloodwulf mini-series from 1995 in four issues, illustrated by Daerick Gross Sr..  He also appeared in a one-shot from 1995 entitled "Bloodwulf Summer Special" where he was pitted against Supreme.

New Men (Image Comics): New Men was a comic book series published during the 1990s by Image Comics.  It was one of the many titles co-created by Rob Liefeld, and released as part of his "Extreme Studios" imprint.  Like many of Liefeld's creations for this and his "Maximum Comics" line the New Men bore striking similarities to characters from mainstream comic companies; in this case New Men was very similar to Marvel Comics' X-Men franchise.  After an initial launch the series underwent a re-design and revamp by writer Eric Stephenson and Penciler Chris Sprouse with Inks by Al Gordon.

Jeff Matsuda: Jeff Matsuda (born 1970) is a Japanese-American concept artist, comics artist, and animator.  He served as the chief character designer for both "Jackie Chan Adventures" and "The Batman", and is the president and creative director of X-Ray Kid Studios.  Matsuda was discovered by Rob Liefeld after submitting some "WildC.A.T.S. " samples pages to Liefeld's Extreme Studios and Jim Lee's Wildstorm.  However, Matsuda's first published artwork, depicting the "X-Force" character Cable, appeared in the letter art section of "Wizard Magazine".

Supporting paragraphs: Flag-Smasher Deadpool
Answer: Fabian Nicieza