It is card 5 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
Pollen Defense Pokemon Power
If an attack does damage to Erika's Vileplume while it's your Active Pokémon (even if it's Knocked Out), flip a coin. If heads, your opponent's Active Pokémon is now Confused. This power works even while Erika's Vileplume is Asleep, Confused, or Paralyzed.
Attacks
GrassGrassGrass
Mega Drain
30
If Erika's Vileplume does damage to the Defending Pokémon (after applying Weakness and Resistance), remove a number of damage counters from Erika's Vileplume equal to half the damage done to the Defending Pokémon (rounded up to the nearest 10). If Erika's Vileplume has fewer damage counters than that, remove all of them.