Do you want to compare Poison Ivy with John Grey? Discover the powers, weakness & weapons of Poison Ivy and John Grey from Poison Ivy Biography and John Grey Biography. Find out all about Poison Ivy and John Grey.# Check out how is Poison Ivy unique and distinct from John Grey. Discover their love interest, sidekicks, family tree and the movies and games list in which Poison Ivy and John Grey have appeared. Find out everything about them here!