![Koga's Arbok (Challenge from the Darkness No. 019)](https://static.tcgcollector.com/build/images/default-card-image-640x892.0d69bedb.png)
$—
0
Trainer's Pokémon
Stage 1
–
Evolves from
Koga's Ekans
![Grass Grass](https://static.tcgcollector.com/content/images/c5/ec/16/c5ec1646156fdb6d2db562afa7ec0e9b250cc023b7d5955d93265ebb23808031.png)
Poison Buildup
Koga's Arbok is now Poisoned.
![Grass Grass](https://static.tcgcollector.com/content/images/c5/ec/16/c5ec1646156fdb6d2db562afa7ec0e9b250cc023b7d5955d93265ebb23808031.png)
![Grass Grass](https://static.tcgcollector.com/content/images/c5/ec/16/c5ec1646156fdb6d2db562afa7ec0e9b250cc023b7d5955d93265ebb23808031.png)
Poison Power
20
If Koga's Arbok is Poisoned, this attack's base damage is 40 instead of 20 and the Defending Pokémon is now Poisoned.