Maybe you thought stage editors were something recent to Mega Man, but you'd be wrong! Try going back to 1994! After roughly a decade and a half being hidden away, GoldS and JLukas at The Cutting Room Floor have discovered an unused stage editor in both Mega Man X and Mega Man X3. The editor lets you scroll about the stage with a cursor and place tiles that you can select manually, or copy a tile that's already on the screen. There are other features, so much so that two controllers are needed to operate it entirely. Information on how to access and use the editors are here for Mega Man X and here for Mega Man X3.