It exists in several finishes (Normal, Reverse holo). Each one has its own price; the average above is for the regular version.
Artwork by Daisuke Ito. Some collectors chase every card by the same artist: how to start (in Spanish).
Abilities
GUARD Poke-POWER
Once during your turn (before your attack), if Unown G is on your Bench, you may discard all cards attached to Unown G and attach Unown G to 1 of your Pokémon as a Pokémon Tool card. As long as Unown G is attached to a Pokémon, prevent all effects of attacks, excluding damage, done to that Pokémon.
Attacks
PsychicColorless
Hidden Power
50
If Unown G has any damage counters on it, this attack's base damage is 10.
Flavour text
Shaped like ancient writing, it is a huge mystery whether language or UNOWN came first.