Petal Blizzard of Cloned Venusaur almost never hits :s
Maybe ur Cloned Venusaur rebelling against you xD. Now really - moves like Petal Bliizard etc has random hits, so u can not say it almost never hits. Yes, of course, sometimes it happens, sometimes deals 10k+, sometimes 0. I have been tested it already, but I don't put here ss, becouse this information was only for me ;d and hit 5k, 7k, 10k+-. 0k. So as I said, it's random.