AbilityMystic Scale
As long as Milotic ex is in play, each player can't play any Technical Machine cards from his or her hand. Discard all Technical Machine cards in play (both yours and your opponent's).

Emerald is a set in the EX series. It was released on May 1, 2005. The printed size is 106. This checklist is longer, at 107 cards. Milotic ex is 96/106, in position 96 of 107 on this checklist. Before it is 95 Medicham ex, and after it is 97 Raichu ex. The listed rarity is Rare Holo EX.
Milotic ex is a Stage 1 ex Water Pokémon with 130 HP. In the Pokédex this is Milotic (#350), generation 3 (Hoenn). The card says it evolves from Feebas. In this catalog that name is Feebas (#349).
Ryo Ueda illustrated this card. The same name is on 462 other cards in the catalog.
Milotic (#350) has 24 other cards in the catalog. Those other cards are in 19 sets. The other printings with a release date run from 2004 to 2025. The earliest other card is Milotic 12/101 in Hidden Legends (2004). That card is named Milotic, while this one is Milotic ex. That card lists 100 HP, and this one lists 130 HP. The rarity there is Rare Holo, and here it is Rare Holo EX. Atsuko Nishida illustrated that card, and Ryo Ueda illustrated this one. 21 other cards of Milotic list a different HP.
Mystic Scale is listed as Poké-Body. As long as Milotic ex is in play, each player can't play any Technical Machine cards from his or her hand. Discard all Technical Machine cards in play (both yours and your opponent's). The attack Gentle Wrap lists 30 damage. The cost is Water. The Defending Pokémon can't retreat during your opponent's next turn. Reflect Energy is another attack lists 70 damage. The cost is Water, Colorless, Colorless. Move 1 basic Energy card attached to Milotic ex to 1 of your Benched Pokémon. Weakness is Lightning ×2. Retreat cost is 2. The card text says: When Pokémon-ex has been Knocked Out, your opponent takes 2 Prize cards.
I keep a set binder for Emerald, meant to hold every card of that set. This card is one slot in the Emerald set binder. A generation binder holds one card of each species. Milotic can fill a slot in Generation 3 binder (Hoenn). I still need this card.
As long as Milotic ex is in play, each player can't play any Technical Machine cards from his or her hand. Discard all Technical Machine cards in play (both yours and your opponent's).
The Defending Pokémon can't retreat during your opponent's next turn.
Move 1 basic Energy card attached to Milotic ex to 1 of your Benched Pokémon.
When Pokémon-ex has been Knocked Out, your opponent takes 2 Prize cards.
Emerald, in the EX series. It was released on May 1, 2005. The printed size is 106.
96/106. It is entry 96 of 107 in this checklist.
Ryo Ueda. The catalog lists 462 other cards with that illustrator.
Rare Holo EX.
Milotic #350, generation 3 (Hoenn).
Gentle Wrap (30) and Reflect Energy (70).