Kyle and frequent collaborator Chris Yost are perhaps best known for the creation of mutant character X23 teenage female clone of Wolverine In 2003 Kyle and Yost cowrote the episodes of XMen Evolution that introduced X23 to the XMen Evolution universe Marvel executives were impressed with X23s reception on TV and subsequently asked Yost and Kyle to adapt the character into comics first by writing the character into a six issue eponymous miniseries and then by taking over writing chores as of issue 20 on the New XMen formerly New XMen Academy X title bringing X23 in as a regular character The success of X23s first miniseries X23 Innocence Lost prompted Marvel to order a second sixissue miniseries with Kyle and Yost at the helm titled X23 Target X Kyle and Yost concluded their stint on the New XMen title after the events of XMen Messiah Complex when the title turned into Young XMen Chris Yost and Kyle cowrote the revamped XForce with Clayton Crain on pencils the cast featured Wolverine Warpath Wolfsbane and X23 as black ops agents on assassination missions per the orders of Cyclops The series ended in 2010 and was replaced by Uncanny XForce written by Rick Remender