Think there was some confusion about which Ditto, because we all think of Ditto Prism when hearing Ditto I guess.
Yes, Ditto from the Detective Pikachu set might be an interesting tech. Not sure whether it is good enough though. Ditto could use Choice Band but can't use Electropower, so 150 without or 180 damage with Choice Band must be enough then, otherwise I would suggest using another PikaRom or maybe Jolteon GX. Whether that's too situational.. I don't know.
It's an interesting tech in so many decks though. But you have to 'get lucky' your opponent is playing the right deck / Pokémon to copy, since you are copying your opponent's Pokémon's attacks. But there is a fair chance your opponent is at least playing a lightning deck at the moment I guess.
I think not having access to the Electropower damage buff and the fact that it only has 60 HP (so kiss goodbye to your 3-6 energy you have attached on that thing) are fatal for Ditto. I agree it's an interesting tech, but I'm not super convinced that it's home is in PikaRom.
If this tech was able to hit something for weakness then it would be a more viable tech. But it could be possibly thrown in Zapdos buzz decks to hit a little harder against zoroark decks since it plays rainbow energies.