Ditto is far too frail to be playing the speed tie running quick claw only ensures you lose 2 in 5 dittos in any one OHKO vs. OHKO contest. Ignoring the fact that not running shadow sneak on shedinja is stupid lets look at the correct play against a shedinja switch in.
keremal wrote:then that makes no sense whatsoever. choice scarf isn't a good item for ditto, or really any choice item. quick claw is more viable, because you don't have to reset your transformation from impostor every time you attack. plus, the opponent could have a shedinja, and you could have used a move last turn that isn't super effective on shedinja (wonder guard). if you had a choice scarf, then it would be reset, take damage on another ditto, which on impostor, auto transforms into shedinja and because of wonder guard being it's only ability, the opposing shedinja can just take an agility from your switch out and shadow claw sweep your entire team. with quick claw, you could handle that entire situation and not be forced to switch out, if the mon your ditto transformed into can SE shedinja, thus possibly killing it if it doesn't have a focus sash (extra life on shedinja because of 1 hp).
(i had to check for no extra posts because of ninja-ing XD)
Shedinja switches in
Shedinja uses agility (+2)
Shedinja uses agility (+4)
Shedinja uses agility (+6)
Shedinja uses swordsdance (+2)(+6)
Shedinja uses swordsdance (+4)(+6)
Shedinja uses swordsdance (+6)(+6)
Shedinja uses shadow claw
Next Ditto transforms into Shedinja (You seem to forget that transform also copies stat ups at the time of transformation)
Ditto uses Shadow claw to KO
Focus sash and focus band also don't work on Shedinja unless they specifically changed that in the newest games.
While your Ditto would die 40% of the time with quick claw.