Hey, first off let me say thanks for reading! I have been meaning to come back to this for a while and I may actually have the time now!
Okay about your question, I think what your asking is how did Tyvan come up with the name ditto? If that is your question let me explain. Basically after noticing that this strange new pokemon has the power to copy other pokemon he tried to come up with a name that represented that. That is why he try’s out the names Shifty and Transformo, but neither sound right. Ditto basically means exact copy or ‘same goes for me’ and it just sounded right to him. And of course we know that Ditto is the name handed down from the Nintengods. If you have any more questions please ask! And again thanks for reading!