Katoki also has worked in Super Robot Wars and Virtual On video games, and in the Patlabor 2 movie. He also does touch-up design in the many mobile suits for the Master Grade kits from Bandai.
In his art book Gundam Fix Katoki said, "Do people, like myself, spend time imagining what it would be like if Gundam robots were actually present on the streets of our cities? Are you sure you're not limiting yourself to the images that were offered in the animated series? One of the reasons that I fell in love with Gundam was that it excites me to imagine what it would be like if these machines actually existed, and I worry that other fans may be losing out..." He said he hopes his work will catch peoples' attention"...then people who had never before been drawn in by the magic of these giant robots may discover their attraction for the first time."
He is also the designer of the Gundam FIX Figuration series.
He was also involved in the color scheme design of Toyota Team Kraft's SC430(#35, GT500) which paricipating in Super GT seasons in 2006 and 2007. His colour scheme was later replaced by Gundam Exia-like colour scheme on July, 2007(race 5 in 2007 season) as a promotion project of Mobile Suit Gundam 00, the most recent Gundam Series.