Hidden Legends is a set in the EX series. It was released on June 1, 2004. The printed size is 101. This checklist is longer, at 102 cards. Lanturn is 38/101, in position 38 of 102 on this checklist. Before it is 37 Igglybuff, and after it is 39 Loudred. The listed rarity is Uncommon.
Lanturn is a Stage 1 Lightning Pokémon with 80 HP. In the Pokédex this is Lanturn (#171), generation 2 (Johto). The card says it evolves from Chinchou. In this catalog that name is Chinchou (#170).
Aya Kusube illustrated this card. The same name is on 127 other cards in the catalog.
Lanturn (#171) has 25 other cards in the catalog. Those other cards are in 21 sets. The other printings with a release date run from 2000 to 2024. The earliest other card is Lanturn 38/111 in Neo Genesis (2000). That card lists 70 HP, and this one lists 80 HP. Both list the rarity Uncommon. Ken Sugimori illustrated that card, and Aya Kusube illustrated this one. 16 other cards of Lanturn list a different HP.
Energy Grounding is listed as Poké-Power. Once during your opponent's turn, when any of your Pokémon is Knocked Out by your opponent's attacks, you may use this power. Choose a basic Energy card discarded from the Knocked Out Pokémon and attach it to Lanturn. You can't use more than 1 Energy Grounding Poké-Power each turn. The attack Lightning Strike lists 50 damage. The cost is Lightning, Lightning, Colorless. You may discard all Lightning Energy attached to Lanturn. If you do, this attack's base damage is 90 instead of 50. Weakness is Fighting ×2. Retreat cost is 2.
I keep a set binder for Hidden Legends, meant to hold every card of that set. This card is one slot in the Hidden Legends set binder. A generation binder holds one card of each species. Lanturn can fill a slot in Generation 2 binder (Johto). I still need this card.