Originally Posted by Ayotui
then how about you go to to fuchsia city like to glitch tells you to.
In pokemon yellow, Ditto can only be found in the mansion in Cinnabar and inside Cerulean cave. Fuschia is probably for Blue/Red.
*I have also tried fainting and returning to the last pokemon center, but it doesn't work, because after that, you can normally press the start button.