you joke, but Ditto's Imposter hidden ability actually makes it competitively viable, as it allows Ditto to transform upon switch and he gets any stat boosts the opponent has gotten, but without the restriction of having to adhere to the opponent's item choice. bringing in Ditto with Choice Scarf on a guy who set up swords Dance and swept one of your own pokes is an excellent way to shut the sweep down and even doing a little bit of your own house cleaning.