>>45992831This borders on "le game theory" territory but in first gen, ditto appears in cerulean cave where mewtwo is caught and iirc in one other area related to mew being cloned. Transform was mew's signature move, and mew's dex entries discuss it "containing the DNA of all pokemon," so people speculate dittos are botched clones. I think it was probably intentional, the early games have some deliberate subtleties like that.