Fabian Nicieza ( born 31 December 1961 ) is an Argentine-American comic book writer and editor who is best known for his work on TV animated series such as The Simpsons , Dora the Explorer , X-Men : Evolution , The Fairly OddParents , Justice League and The Adventures of Jimmy Neutron : Boy Genius , for all of which he helped create numerous characters .
Fabian Nicieza created characters for Marvel comics .