Ariados

Spider Web

Flip a coin. If heads, the Defending Pok?mon can't retreat. (Benching or evolving that Pok?mon ends this effect.)

Poison Bite20

If this attack damages the Defending Pok?mon, the Defending Pok?mon is now Poisoned and you remove a number of damage counters from Ariados equal to half that damage (rounded up to the nearest 10). If Ariados has fewer damage counters than that, remove all of them.