AttackDarkness Switch
Discard an Energy card attached to Rocket's Mewtwo ex, and then switch all damage counters on Rocket's Mewtwo ex with those on the Defending Pokémon. (If an effect of this attack is prevented, this attack does nothing.)

Mewtwo is Pokédex #150, generation 1 (Kanto). Rocket's Mewtwo ex is a Basic ex Darkness Pokémon with 100 HP.
Rocket's Mewtwo ex sits at 99/109 in Team Rocket Returns, position 99 of 111. Before it is 98 Rocket's Hitmonchan ex, and after it is 100 Rocket's Moltres ex. The set belongs to the EX series. It was released on November 1, 2004. The printed size is 109. This checklist is longer, at 111 cards. The listed rarity is Rare Holo EX.
The attack Darkness Switch lists no damage number. The cost is Psychic. Discard an Energy card attached to Rocket's Mewtwo ex, and then switch all damage counters on Rocket's Mewtwo ex with those on the Defending Pokémon. (If an effect of this attack is prevented, this attack does nothing.) Hypnoblast is another attack lists 40 damage. The cost is Psychic, Colorless, Colorless. Flip a coin. If heads, the Defending Pokémon is now Asleep. Psyburn is another attack lists 70 damage. The cost is Psychic, Colorless, Colorless, Colorless. Weakness is Psychic ×2. Retreat cost is 2. The card text says: When Pokémon-ex has been Knocked Out, your opponent takes 2 Prize cards.
Mewtwo (#150) has 88 other cards in the catalog. Those other cards are in 41 sets. The other printings with a release date run from 1999 to 2026. The earliest other card is Mewtwo 10/102 in Base (1999). That card is named Mewtwo, while this one is Rocket's Mewtwo ex. That card lists 60 HP, and this one lists 100 HP. The rarity there is Rare Holo, and here it is Rare Holo EX. Ken Sugimori illustrated that card, and Mitsuhiro Arita illustrated this one. Retreat cost there is 3, and here it is 2. 86 other cards of Mewtwo list a different HP.
The illustrator line reads Mitsuhiro Arita. I count 721 other cards in the catalog with that illustrator.
Team Rocket Returns set binder is where a full Team Rocket Returns set goes. This card fills one slot there. A generation binder holds one card of each species. Mewtwo can fill a slot in Generation 1 binder (Kanto). Themed lists that include this exact card are Mitsuhiro Arita cards, Trainer's Pokémon, Team Rocket cards, and Mew and Mewtwo. I still need this card.
Discard an Energy card attached to Rocket's Mewtwo ex, and then switch all damage counters on Rocket's Mewtwo ex with those on the Defending Pokémon. (If an effect of this attack is prevented, this attack does nothing.)
Flip a coin. If heads, the Defending Pokémon is now Asleep.
When Pokémon-ex has been Knocked Out, your opponent takes 2 Prize cards.
Team Rocket Returns, in the EX series. It was released on November 1, 2004. The printed size is 109.
99/109. It is entry 99 of 111 in this checklist.
Mitsuhiro Arita. The catalog lists 721 other cards with that illustrator.
Rare Holo EX.
Mewtwo #150, generation 1 (Kanto).
Darkness Switch, Hypnoblast (40), and Psyburn (70).