>>39362504Ferro will only drop if they just took Ferrothorn now and gave it a fire immunity ability, magic bounce, or both, but also made it not too good for OU, like Deoxys-D.
It’s pretty much the quintessential hazard setter and the only things that give it competition are Smeargle, Shuckle, and Araquanid, and only because they have Sticky Webs. Also give said new ferro stick webs too.