It is card 8 of the 132 in the official Gym Heroes checklist. If you are completing the set, mark it in your collection to keep track.
Rarity: Holo Rare. The symbol in the bottom corner confirms it at a glance, as explained in Pokémon card rarities explained.
It exists in several finishes (Holo, 1st edition). Each one has its own price; the average above is for the regular version.
Artwork by Ken Sugimori. Some collectors chase every card by the same artist: how to start (in Spanish).
Abilities
Energy Charge Pokemon Power
As often as you like during your turn (before your attack), if Lt. Surge's Magneton is your Active Pokémon, you may take 1 Lightning Energy card attached to 1 of your Pokémon and attach it to Lt. Surge's Magneton. This power can't be used if Lt. Surge's Magneton is Asleep, Confused, or Paralyzed.
Attacks
LightningLightningLightningColorless
Mega Shock
50
Flip a coin. If tails, Lt. Surge's Magneton does 20 damage to itself.