Dark Void's accuracy was reduced to 50% for each Pokémon.
Dark Void can now only be successfully used by Darkrai (or a Pokémon that has transformed into Darkrai). If this move is used by any other Pokémon (including via Assist or Metronome), the move will fail, displaying the battle text "But <Pokémon> can't use the move!". Dark Void will not fail when reflected by Magic Bounce.
If powered up by a Darkinium Z into Z-Dark Void, all of the user's lowered stats are reset.
Darkrai puts its hands together and forms a crimson and black or purple and black ball in its hands. It then fires it at the opponent. When the opponent is hit, a crimson or pink bubble appears around the opponent's body that soon disappears and makes them fall asleep, or Darkrai creates a crimson ball and holds it above its head, releasing multiple smaller balls from the larger one all around its body. When the small balls it the opponent, they form a pink crimson bubble around it that fade away into dark crimson. Once the sphere disappears, the opponent falls asleep.