Magic Mirror On The Wall, You'll Outspeed Me, And I'll Fall
Ditto@Choice Scarf
Quirky nature
Imposter
255 HP
~Transform
Ditto used to be one of those bottom-of-the-barrel NU novelties someone would only use on a dare or due to some form of insanity, or if it happened to be their favorite. But now, Ditto has a great new toy in the form of Imposter, allowing it to transform without the need to attack. And trust me when I say that that makes a big, stinking difference. Ditto doesn't even need to know any moves, but since the games prohibit moveless Pokemon, Transform is more or less a necessity.
Item is to ensure Ditto still outspeeds when it transforms, given that it and the foe would share a Speed stat. Speed ties are unreliable. Ability... what do you think we've been talking about this whole time?
Other options:
*Ahaha.
*Ahahahahahaha.
*AHAHAHAHAHAHAHAHAHAHAHAHAHAHA!
*OK, but seriously, if you like to take risks, you can replace the Choice Scarf with a Quick Claw. Gives Ditto freedom to change moves, but now it's not a guarantee to win the Speed tie. Still skews the odds slightly better than 50/50, though. Don't be tempted to use Quick Powder, it ceases to work once Imposter has activated.
Abilities:
*Limber: Ditto can't be paralyzed. Not a bad ability in and of itself, but given that the preferred tactic for taking out an untransformed Ditto would involve attacking it outright, it's not exactly an Arceussend.
*Imposter: Ditto's Hidden Ability, and just about everything it could have hoped for. Ditto will, upon being sent out, transform into its opponent automatically, provided said opponent isn't hiding behind a Substitute or an Illusion. In Double or Triple battles, Ditto will transform into the opponent directly across from it.
Partners:
If the Choice Scarf makes you uneasy, you can opt for some form of Tailwind support. It should last just long enough to allow you to outspeed and KO the foe Ditto turned into in the first place.
Counters:
Zoroark with its Illusion still up stops Imposter from turning Ditto into Zoroark. Zoroark even comes with Pursuit to catch Ditto on the way out once its trainer figures out the problem. Other than that, you'd better stock your team so you can reliably counter any of your own Pokemon, because you just might need to.
Opinion:
I've always liked Ditto, and Imposter is exactly what it needed.
Request for next week:
Garbodor.