AbilityPsychic Vision
Once during your turn (before your attack), if Mew ex is on your Bench, you may look at your opponent's hand.

Mew is Pokédex #151, generation 1 (Kanto). Mew ex is a Basic ex Psychic Pokémon with 90 HP.
Mew ex sits at 100/110 in Holon Phantoms, position 100 of 111. Before it is 99 Crawdaunt ex, and after it is 101 Mightyena ex. The set belongs to the EX series. It was released on May 1, 2006. The printed size is 110. This checklist is longer, at 111 cards. The listed rarity is Rare Holo EX.
Psychic Vision is listed as Poké-Power. Once during your turn (before your attack), if Mew ex is on your Bench, you may look at your opponent's hand. The attack Super Psy Bolt lists 30 damage. The cost is Colorless, Colorless. Devo Crush is another attack lists 50 damage. The cost is Psychic, Colorless, Colorless. You may discard 2 Energy attached to Mew ex. If you do, you may remove the highest Stage Evolution card from the Defending Pokémon and shuffle that card into your opponent's deck. Weakness is Psychic ×2. Retreat cost is 1. The card text says: When Pokémon-ex has been Knocked Out, your opponent takes 2 Prize cards.
Mew (#151) has 60 other cards in the catalog. Those other cards are in 35 sets. The other printings with a release date run from 1999 to 2026. The earliest other card is Mew 8/53 in Wizards Black Star Promos (1999). That card is named Mew, while this one is Mew ex. That card lists 50 HP, and this one lists 90 HP. The rarity there is Promo, and here it is Rare Holo EX. Ken Sugimori illustrated that card, and Ryo Ueda illustrated this one. 58 other cards of Mew list a different HP.
The illustrator line reads Ryo Ueda. I count 462 other cards in the catalog with that illustrator.
Holon Phantoms set binder is where a full Holon Phantoms set goes. This card fills one slot there. A generation binder holds one card of each species. Mew can fill a slot in Generation 1 binder (Kanto). I still need this card.
Once during your turn (before your attack), if Mew ex is on your Bench, you may look at your opponent's hand.
You may discard 2 Energy attached to Mew ex. If you do, you may remove the highest Stage Evolution card from the Defending Pokémon and shuffle that card into your opponent's deck.
When Pokémon-ex has been Knocked Out, your opponent takes 2 Prize cards.
Holon Phantoms, in the EX series. It was released on May 1, 2006. The printed size is 110.
100/110. It is entry 100 of 111 in this checklist.
Ryo Ueda. The catalog lists 462 other cards with that illustrator.
Rare Holo EX.
Mew #151, generation 1 (Kanto).
Super Psy Bolt (30) and Devo Crush (50).