The strongest counters to the Dark typing isFairy-type Pokemon. This is mostly because Fairy-types typically have really strong Attack stats and/or moves. Examples of Pokemon like this would be Mega Gardevoir and Xerneas. Fairy-types also get access to Charm, a contender for best quick attack...
this is a DP team, not even DPP. lucario didnt get ice punch yet so this was a Swords Dance HP Ice Lucario to remove gliscor. heatran + machamp where both restalkers. mesprit was bold with max def to help combat garchomp (yea he was legal during this) and celebi was bold with ...