AbilityUnseen Flash
Once during your turn (before your attack), you may put 2 Lightning Energy cards from your hand in the Lost Zone. If you do, your opponent's Active Pokémon is now Paralyzed.

Lost Thunder is a set in the Sun & Moon series. It was released on November 2, 2018. The printed size is 214. This checklist is longer, at 240 cards. Ampharos is 78/214, in position 78 of 240 on this checklist. Before it is 77 Flaaffy, and after it is 79 Raikou. The listed rarity is Rare Holo.
Ampharos is a Stage 2 Lightning Pokémon with 150 HP. In the Pokédex this is Ampharos (#181), generation 2 (Johto). The card says it evolves from Flaaffy. In this catalog that name is Flaaffy (#180).
Satoshi Shirai illustrated this card. The same name is on 50 other cards in the catalog.
Ampharos (#181) has 37 other cards in the catalog. Those other cards are in 26 sets. The other printings with a release date run from 2000 to 2026. The earliest other card is Ampharos 1/111 in Neo Genesis (2000). That card lists 80 HP, and this one lists 150 HP. Both list the rarity Rare Holo. Ken Sugimori illustrated that card, and Satoshi Shirai illustrated this one. 34 other cards of Ampharos list a different HP.
Unseen Flash is listed as Ability. Once during your turn (before your attack), you may put 2 Lightning Energy cards from your hand in the Lost Zone. If you do, your opponent's Active Pokémon is now Paralyzed. The attack Split Bomb lists no damage number. The cost is Lightning, Lightning. This attack does 50 damage to 2 of your opponent's Pokémon. (Don't apply Weakness and Resistance for Benched Pokémon.) Weakness is Fighting ×2. Resistance is Metal -20. Retreat cost is 2. The flavor text reads "The tail's tip shines brightly and can be seen from far away. It acts as a beacon for lost people."
I keep a set binder for Lost Thunder, meant to hold every card of that set. This card is one slot in the Lost Thunder set binder. A generation binder holds one card of each species. Ampharos can fill a slot in Generation 2 binder (Johto). I still need this card.
Once during your turn (before your attack), you may put 2 Lightning Energy cards from your hand in the Lost Zone. If you do, your opponent's Active Pokémon is now Paralyzed.
This attack does 50 damage to 2 of your opponent's Pokémon. (Don't apply Weakness and Resistance for Benched Pokémon.)
The tail's tip shines brightly and can be seen from far away. It acts as a beacon for lost people.
Lost Thunder, in the Sun & Moon series. It was released on November 2, 2018. The printed size is 214.
78/214. It is entry 78 of 240 in this checklist.
Satoshi Shirai. The catalog lists 50 other cards with that illustrator.
Rare Holo.
Ampharos #181, generation 2 (Johto).
Split Bomb.