Until the end of your next turn, if an attack damages the Defending Pokémon (after applying Weakness and Resistance), that attack does 20 more damage to the Defending Pokémon.
If this attack damages the Defending Pokémon, the Defending Pokémon is now Poisoned and you remove a number of damage counters from Golbat equal to half that damage (rounded up to the nearest 10). If Golbat has fewer damage counters than that, remove all of them. Either way, the Defending Pokémon is now Poisoned.
It can drink more than 10 ounces of blood at once. If it has too much, it gets heavy and flies clumsily.
Prices updated once a day.

Golbat
#050~€0.03Chaos Rising

Golbat
#028~€0.04Shrouded Fable

Golbat
#111~€0.06Paradox Rift

Golbat
#042~€0.07151

Golbat
#104~€0.05Silver Tempest

Golbat
#90~€0.09Battle Styles

Golbat
#65~€0.22Unbroken Bonds

Golbat
#6~€0.14SM trainer Kit (Alolan Raichu)

Golbat
#55~€0.11Sun & Moon

Golbat
#31~€0.24Generations

Golbat
#32~€0.25Phantom Forces

Golbat
#54~€0.26Plasma Storm

Golbat
#30~€0.27Unleashed

Golbat
#50~€0.27Mysterious Treasures

Golbat
#43~€0.62Delta Species

Golbat
#31~€1.95Deoxys

Golbat
#36~€1.04Hidden Legends

Golbat
#60~€29.46Skyridge