
Artist Haruki Suetsugu did not design its characters as he would do for later games in the series, but was given drafts in order to draw illustrations for promotional purposes. Inafune left his former design responsibilities up to other artists that had previously worked on the Mega Man X series. They did not want the ideals of Repliforce and the Maverick Hunters to be so black-and-white.

Instead of presenting Repliforce as blatantly evil villains like Sigma, the writing staff decided to leave them some "moral leeway. He was also involved in creating the game's storyline, a role he described as "only slightly less than it was for X1". Instead of designing the game's various pieces of artwork as he had done in the past, Keiji Inafune focused his attention on being a producer.

The rest of the history follows here thanks to the game's Wikipedia Page: In X4, they made him play COMPLETELY different from X and it shows, but will get to that in the gameplay portion.
