Unown [X] - 71/132 - Uncommon from Diamond & Pearl: Secret Wonders, available at 401 Games Canada.

• Rarity: Uncommon
• Finish: Normal
• Artist: Kazuyuki Kano
• Card Text:
  Poké-POWER — X-RAY
  Once during your turn (before your attack), if you have Unown X on your Bench, you may look at the top card of your opponent's deck and put it back on top of his or her deck.
  [1] Hidden Power (10)
  Flip a coin. If heads, the Defending Pokémon is now Paralyzed.